Yoga

Decrease Hypertension with Yoga Practice

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Decrease Hypertension with Yoga Practice

 

By John M. de Castro, Ph.D.

 

“Yoga, when performed mindfully, can reduce this type of stress-induced hypertension, while addressing its underlying causes. It pacifies the sympathetic nervous system and slows down the heart, while teaching the muscles and mind to relax deeply.” – Marla Apt

 

High Blood Pressure (Hypertension) is an insidious disease because there are no overt symptoms. The individual feels fine. But it can be deadly as more than 360,000 American deaths, roughly 1,000 deaths each day, had high blood pressure as a primary or contributing cause. In addition, hypertension markedly increases the risk heart attack, stroke, heart failure, and kidney disease.  It is also a very common disorder with about 70 million American adults (29%) having high blood pressure and only about half (52%) of people with high blood pressure have their condition under control.

 

High blood pressure, because it doesn’t have any primary symptoms, is usually only diagnosed by direct measurement of blood pressure usually by a health care professional. When hypertension is chronically present over three quarters of patients are treated with antihypertensive drugs. But these medications often have adverse side effects. So, patients feel lousy when taking the drugs, but fine when they’re not. So, compliance is a major issue with many patients not taking the drugs regularly or stopping entirely.

 

Obviously, there is a need for alternative to drug treatments for hypertension. Mindfulness practices have been shown to aid in controlling hypertension. Exercise is also known to help. So, yoga practice, which combines mindfulness practice with exercise would seem to be a good candidate practice for the treatment of hypertension. Indeed, yoga practice appears to lower blood pressure in hypertension. But yoga practices can contain a number of components including meditation, breathing exercises, postures, chanting, and mantras. It is not known, whether the postures included in the practice are necessary for the beneficial effects of yoga practice on hypertension.

 

In today’s Research News article “Yoga in Arterial Hypertension.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6375068/ ), Cramer and colleagues recruited adult patients with primary arterial hypertension receiving antihypertensive medication. They were randomly assigned to receive either yoga training that either included postures or without postures, or a wait-list control condition. The yoga practice consisted of 90 minutes, once a week, for 12 weeks of meditation, relaxation techniques, and postures for the yoga with postures group. The participants were encouraged and provided materials to practice daily at home. They were measured before and after training and 26 weeks later for systolic and diastolic blood pressure.

 

They found that at the end of training the yoga group without postures had a greater reduction in systolic blood pressure than either the control group or the group with yoga postures. But, at follow-up, 26 weeks later, the yoga group that included postures had a greater reduction in systolic blood pressure than either the control group or the group without yoga postures. Diastolic blood pressure was not affected. It should be noted that these benefits were obtained in patients taking antihypertensive medications. So, the yoga practice benefits supplemented those of the drugs.

 

These are interesting results that suggest that on the short-term yoga practice without postures is best for blood pressure reduction in patients with hypertension while for the long-term yoga with postures is best. The relaxation produced by practicing meditation and relaxation may have the immediate consequence of decreasing blood pressure but doesn’t appear to be sustained while the exercise involved in postures, like occurs with other aerobic exercises, may have more long-term benefits for the cardiovascular system.

 

These benefits are important as reducing blood pressure in patients with hypertension is important for their health, longevity, and well-being. Yoga appears to be a safe, effective, and relatively inexpensive treatment. In addition, yoga practice has psychological and social benefits that can help to maintain practice over the long-term.

 

So, decrease hypertension with yoga practice.

 

“Yoga, along with deep breathing exercises, meditation and inner reflection, is a good adjunctive and integrative cardiovascular approach to better health, including lowering blood pressure, as this data suggests,” – David Friedman

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Cramer, H., Sellin, C., Schumann, D., & Dobos, G. (2018). Yoga in Arterial Hypertension. Deutsches Arzteblatt international, 115(50), 833-839. DOI: 10.3238/arztebl.2018.0833

 

Abstract

Background

Yoga seems to exert its effect against arterial hypertension mainly through the associated breathing and meditation techniques, and less so through yoga postures. The goal of this trial was to compare the blood pressure–lowering effect of yoga interventions with and without yoga postures in patients with arterial hypertension.

Methods

75 patients taking medications for arterial hypertension (72% women, mean age 58.7 ± 9.5 years) were randomized into three groups: a yoga intervention group with yoga postures (25 patients, of whom 5 dropped out of the trial before its end), a yoga intervention group without yoga postures (25 patients, 3 dropouts), and a wait list control group (25 patients, one dropout). The interventions consisted of 90 minutes of yoga practice per week for twelve weeks. The data collectors, who were blinded to the intervention received, assessed the primary outcome measures “systolic 24-hour blood pressure” and “diastolic 24-hour blood pressure” before and after the intervention. In this report, we also present the findings on secondary outcome measures, including follow-up data.

Results

After the intervention, the systolic 24-hour blood pressure in the yoga intervention group without yoga postures was significantly lower than in the control group (group difference [?]= -3.8 mmHg; [95% confidence interval (CI): (-0.3; -7.4) p = 0.035]); it was also significantly lower than in the yoga intervention group with yoga postures (? = -3.2 mmHg; 95% CI: [-6.3; -0.8]; p = 0.045). Diastolic blood pressures did not differ significantly across groups. No serious adverse events were encountered in the course of the trial.

Conclusion

In accordance with the findings of earlier studies, we found that only yoga without yoga postures induced a short-term lowering of ambulatory systolic blood pressure. Yoga is safe and effective in patients taking medications for arterial hypertension and thus can be recommended as an additional treatment option for persons in this category.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6375068/

 

Improve Quality of Life in Breast Cancer Survivors with Exercise or Yoga

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Improve Quality of Life in Breast Cancer Survivors with Exercise or Yoga

 

By John M. de Castro, Ph.D.

 

“In studies of women with breast cancer, yoga has been shown to reduce fatigue and improve quality of sleep, physical vitality, and overall quality of life.” – BreastCancer.org

 

Receiving a diagnosis of cancer has a huge impact on most people. Feelings of depression, anxiety, and fear are very common and are normal responses to this life-changing and potentially life-ending experience. But cancer diagnosis is not necessarily a death sentence. Over half of the people diagnosed with cancer are still alive 10 years later and this number is rapidly increasing. But, surviving cancer carries with it a number of problems. Anxiety, depression, fatigue and insomnia are common symptoms in the aftermath of surviving breast cancer. These symptoms markedly reduce the quality of life of the patients.

 

Mindfulness training has been shown to help with cancer recovery and help to alleviate many of the residual physical and psychological symptoms, including fatigue, stress,  sleep disturbance, and anxiety and depression. Yoga practice is a form of mindfulness training that has been shown to be beneficial for cancer patients. But yoga practice is both a mindfulness practice and an exercise. It is unclear whether the benefits of yoga practice for cancer patients is due to its mindfulness or exercise components or both. The research has been accumulating. It is thus important to take a step back and summarize what has been learned.

 

In today’s Research News article “Yoga-Specific Enhancement of Quality of Life Among Women With Breast Cancer: Systematic Review and Exploratory Meta-Analysis of Randomized Controlled Trials.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6388460/ ), El-Hashimi and Gorey review, summarize and perform a meta-analysis of the effectiveness of yoga for improving the quality of life in survivors of breast cancer. They found and report on 8 randomized controlled trials that included a comparison to another exercise program.

 

They report that the research demonstrated that exercise practices including yoga produce significant improvements in quality of life for the breast cancer patients that are still present as much as a year later. But yoga practice was not significantly better than other exercise programs in improving the quality of life. It would appear that the fact that yoga practice is an exercise and not its mindfulness aspect is critical for the improvement in the quality of life of breast cancer patients.

 

So, improve quality of life in breast cancer survivors with exercise or yoga.

 

“Yoga, meditation, and breathing practices allow women with breast cancer to explore their emotions, foster mindful empathy, and cope with fatigue and tightness,” – Sierra Campbell

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

El-Hashimi, D., & Gorey, K. M. (2019). Yoga-Specific Enhancement of Quality of Life Among Women With Breast Cancer: Systematic Review and Exploratory Meta-Analysis of Randomized Controlled Trials. Journal of evidence-based integrative medicine, 24, 2515690X19828325.

 

Abstract

Physical activities during and after cancer treatment have favorable psychosocial effects. Increasingly, yoga has become a popular approach to improving the quality of life (QoL) of women with breast cancer. However, the extant synthetic evidence on yoga has not used other exercise comparison conditions. This meta-analysis aimed to systematically assess yoga-specific effects relative to any other physical exercise intervention (eg, aerobics) for women with breast cancer. QoL was the primary outcome of interest. Eight randomized controlled trials with 545 participants were included. The sample-weighted synthesis at immediate postintervention revealed marginally statistically and modest practically significant differences suggesting yoga’s potentially greater effectiveness: d = 0.14, P = .10. However, at longer term follow-up, no statistically or practically significant between-group difference was observed. This meta-analysis preliminarily demonstrated that yoga is probably as effective as other exercise modalities in improving the QoL of women with breast cancer. Both interventions were associated with clinically significant improvements in QoL. Nearly all of the yoga intervention programs, however, were very poorly resourced. Larger and better controlled trials of well-endowed yoga programs are needed.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6388460/

 

Improve Sleep in Breast Cancer Patients Undergoing Chemotherapy with Yoga

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Improve Sleep in Breast Cancer Patients Undergoing Chemotherapy with Yoga

 

By John M. de Castro, Ph.D.

 

“Sleep disturbance is a common problem for women with breast cancer, and can have a variety of causes, from stress and depression related to the treatment or diagnosis, to a side effect of some of the drugs and anti-nausea medications used in chemotherapy regimens. Yoga not only produced benefits in the short term, it also produced benefits in sleep quality three months and six months after treatment.” – Paul Raeburn

 

Receiving a diagnosis of cancer has a huge impact on most people. Feelings of depression, anxiety, and fear are very common and are normal responses to this life-changing and potentially life-ending experience. But cancer diagnosis is not necessarily a death sentence. Over half of the people diagnosed with cancer are still alive 10 years later and this number is rapidly increasing. But, surviving cancer carries with it a number of problems. Fatigue and insomnia are common symptoms in the aftermath of surviving breast cancer.

 

Mindfulness training has been shown to help with cancer recovery and help to alleviate many of the residual physical and psychological symptoms, including fatigue, stress,  sleep disturbance, and anxiety and depression. Yoga practice is a form of mindfulness training that has been shown to be beneficial for cancer patients.  In today’s Research News article “Randomized trial of Tibetan yoga in patients with breast cancer undergoing chemotherapy.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5735004/ ), Chaoul and colleagues examine the ability of yoga practice to improve sleep in breast cancer patients.

 

They recruited patients with Stage 1 to 3 breast cancer scheduled to undergo chemotherapy. They were randomly assigned to usual care or to either receive a Tibetan Yoga Program or a stretching program. Participants met for 4, 75 to 90-minute, sessions during chemotherapy and 3 booster sessions over the next 6 months. The participants were also encouraged to practice at home. The Tibetan Yoga Program consisted of “1) mindfulness and focused attention through guided meditation with breathing and visualization; 2) an alternate nostril breathing practice and a breath retention exercise; 3) Tsa Lung movements; and 4) closing with a brief compassion-based meditation.” The participants were measured before and after the programs and 3, 6, and 12 months later for sleep quality, fatigue, and actigraph measured sleep patterns.

 

They found that all groups improved in sleep quality and fatigue over the 12-month measurement period. But the Tibetan Yoga group had significantly less daily sleep disturbances and fewer minutes awake before sleep onset. Hence, participation in the Tibetan Yoga Program had modest benefits for the quality of sleep for the patients. The Tibetan Yoga Program contains a number of different components including meditation, postures, and breathing exercises. It is impossible to determine in the current study which components or which combinations of components were necessary and sufficient for the benefits.

 

These results are encouraging but not clinically significant as the effects were very modest. But,

it should be kept in mind that yoga and meditation programs have been shown to improve a number of other impacts of breast cancer diagnosis and survival. So, the total impact of participation in yoga for breast cancer patients may be much greater than implied by the current results.

 

So, improve sleep in breast cancer patients undergoing chemotherapy with yoga.

 

“it is encouraging to see that the women who practiced yoga outside of class had improved sleep outcomes over time. Previous research has established that yoga effectively reduces sleep disturbances for cancer patients, but have not included active control groups or long-term follow-up.” – Lorenzo Cohen

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Chaoul, A., Milbury, K., Spelman, A., Basen-Engquist, K., Hall, M. H., Wei, Q., Shih, Y. T., Arun, B., Valero, V., Perkins, G. H., Babiera, G. V., Wangyal, T., Engle, R., Harrison, C. A., Li, Y., … Cohen, L. (2017). Randomized trial of Tibetan yoga in patients with breast cancer undergoing chemotherapy. Cancer, 124(1), 36-45.

 

Abstract

BACKGROUND

This randomized trial examined the effects of a Tibetan yoga program (TYP) versus a stretching program (STP) and usual care (UC) on sleep and fatigue in women with breast cancer undergoing chemotherapy.

METHODS

Women with stage I–III breast cancer undergoing chemotherapy were randomized to TYP (n=74), STP (n=68), or UC (n=85) groups. Participants in the TYP and STP groups participated in 4 sessions during chemotherapy, followed by three booster sessions over the subsequent 6 months, and encouraged to practice at home. Self-report measures of sleep disturbances (Pittsburgh Sleep Quality Index) fatigue (Brief Fatigue Inventory), and actigraphy were collected at baseline, 1-week post-treatment, and 3, 6 and 12 months.

RESULTS

There were no group differences in total sleep disturbances or fatigue levels over time. However, patients in TYP reported fewer daily disturbances 1-week post-treatment than STP (difference=−0.43, 95% CI: −0.82, −0.04, P=0.03) and UC (difference=−0.41, 95.5% CI: −0.77, −0.05, P=0.02). Group differences at the other time points were maintained for TYP versus STP. Actigraphy data revealed greater minutes awake after sleep onset for STP 1-week post treatment versus TYP (difference=15.36, 95% CI: 7.25,23.48, P=0.0003) and UC (difference=14.48, 95% CI: 7.09,21.87, P=0.0002). Patients in TYP who practiced at least two times a week during follow-up reported better PSQI and actigraphy outcomes at 3 and 6 months post-treatment than those who did not and better than those in UC.

CONCLUSIONS

Participating in TYP during chemotherapy resulted in modest short-term benefits in sleep quality, with long-term benefits emerging over time for those who practiced TYP at least two times a week.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5735004/

 

Improve Physical Fitness with Online Yoga and Tai Chi Practice

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Improve Physical Fitness with Online Yoga and Tai Chi Practice

 

By John M. de Castro, Ph.D.

 

“Once tai chi and yoga are broken down individually, it’s safe to say, they’re almost identical in benefits and components. The main difference is in execution. Yoga involves holding poses and postures. Tai chi is performed in a dance-like, martial arts form. Both can be rigorous, or low impact, depending on the person’s fitness level.” – KXTV

 

Tai Chi has been practiced for thousands of years with benefits for health and longevity. Tai Chi training is designed to enhance function and regulate the activities of the body through regulated breathing, mindful concentration, and gentle movements. Only recently though have the effects of Tai Chi practice been scrutinized with empirical research. It has been found to be effective for an array of physical and psychological issues. It appears to strengthen the immune system, reduce inflammation, increase the number of cancer killing cells in the bloodstream and improve cardiovascular function.

 

Yoga practice has been shown to have a myriad of benefits for psychological and physical health. It is both an exercise and a mind-body practice that stresses both mental attention to present moment movements, breath control, and flexibility, range of motion, and balance. It has been shown to improve balance and flexibility in older individuals.  It is safe and can be practiced by anyone from children to seniors. Recently, there have been a number of high-profile athletes who have adopted a yoga practice to improve their athletic performance.

 

Both Tai Chi and Yoga are taught in studios by experienced teachers. But this is often not convenient or available. An alternative is online teaching and practice. There is, however, little known regarding the effectiveness of these online programs. In today’s Research News article “Effects of Online Yoga and Tai Chi on Physical Health Outcome Measures of Adult Informal Caregivers.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329221/ ), Martin and Candow recruited informal caregivers and randomly assigned them to receive 12 weeks of 150 minutes per week of either online vinyasa yoga or online Tai Chi practice. The participants were measured before and after training for muscle strength and endurance, handgrip strength, walking speed, balance, and flexibility.

 

They found that both groups improved on all measures from the baseline to the completion of training. There were no significant differences found between yoga and tai chi practices except in the case of chest press endurance and abdominal curl up where yoga practice was superior to Tai Chi practice. Hence, both yoga and Tai Chi practice improved the physical abilities of these informal caregivers with yoga practice being slightly better.

 

Caregivers tend to be fairly inactive. So, the engagement in yoga or Tai Chi exercises may be important for the overall health of the participants and their ability to provide care and not burnout. An important component of this study was that the training was done online. Caregivers are usually stressed and have little free time. So, the ability to practice according to their own schedules and at home is a major advantage.

 

So, improve physical fitness with online yoga and Tai Chi practice.

 

”Tai Chi as a powerful tool for disease-prevention—deep relaxation may initiate more of our “disease-fighting” genes when relaxation-exercises are performed routinely over time.” – Jeremey Wiseman

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Martin, A. C., & Candow, D. (2019). Effects of Online Yoga and Tai Chi on Physical Health Outcome Measures of Adult Informal Caregivers. International journal of yoga, 12(1), 37-44.

 

Abstract

Aims:

This study aimed to investigate the effects of online Vinyasa Yoga (VY) and Taijifit™ (12 weeks) in informal caregivers (≥18 years of age).

Methods:

Twenty-nine participants were randomized to two groups: VY (n = 16, 55.87 ± 12.31 years) or Taijifit™ (n= 13, 55.07 ± 12.65 years).

Main Outcome Measures:

Prior to and following the study, assessments were made for muscle strength (1-RM leg press, chest press, and handgrip), muscle endurance (leg press and chest press; maximal number of repetitions performed to fatigue at 80% and 70% baseline 1-RM, respectively), abdominal endurance (maximum number of consecutive curl-ups to fatigue), tasks of functionality (dynamic balance and walking speed), and flexibility (sit and reach).

Results:

There was a significant increase over time for muscle strength, muscle endurance, tasks of functionality, and flexibility (P = 0.001). The VY group experienced a greater improvement in chest press endurance (VY: pre 19.25 ± 5.90, post 28.06 ± 7.60 reps; Taijifit™ pre 15.69 ± 4.49, post 21.07 ± 5.85 reps; P = 0.019) and abdominal endurance (VY: pre 37.12 ± 31.26, post 68.43 ± 55.07 reps; Taijifit™ pre 19.23 ± 19.00, post 32.07 ± 20.87 reps; P = 0.034) compared to the Taijifit™ group.

Conclusions:

VY and Taijifit™ are effective for improving muscle strength and endurance, tasks of functionality, and flexibility in informal caregivers. VY led to greater gains in chest press endurance and abdominal curl-ups.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329221/

 

Improve Physical and Respiratory Function with Yoga

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Improve Physical and Respiratory Function with Yoga

 

By John M. de Castro, Ph.D.

 

“Respiration is our primary and most important movement pattern … and also the most dysfunctional.” – Karel Lewit

 

Breathing is essential for life and generally occurs automatically. It’s easy to take for granted as it’s been there our entire lives. Nevertheless, we become more aware of it when it varies with circumstances, such as when we exercise and also in emotional states, especially fear and anxiety. But we rarely notice it during everyday ongoing life. Yet, its characteristics are associated with our state of well-being. Slow deep breathing is characteristic of a healthy relaxed state. Breathing exercises are common in yoga practices and have been found to have a number of beneficial effects.

 

Yoga practice contains a number of different components that are mixed in varying combinations in different yoga practices. They consist of postures, meditation, relaxation, breathing exercises, and chanting. This presents a challenge in interpreting the beneficial effects of yoga practice. It is difficult to determine which component or which combination of components is required for the benefits.

 

In today’s Research News article “Positive Effects of Yoga on Physical and Respiratory Functions in Healthy Inactive Middle-Aged People.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329219/ ), and colleagues examine the effects of yogic postures and the added benefits of yogic breathing in improving respiratory function in healthy inactive middle-aged people. They recruited inactive non-smoking adults aged 40 to 60 years who were not yoga practitioners and randomly assigned them to receive either training in yoga postures or training in yoga postures plus yogic breathing training. Training occurred in a 70-minute session once a week for 8 weeks. Participants were also provided a DVD for a 7-minute home exercises twice a week. They were measured before and after training for body size and composition, muscle endurance, resting heart rate, flexibility, respiratory function, and respiratory muscle strength.

 

They found both groups after training had significant improvements in muscle endurance, resting heart rate, and upper extremity flexibility. But only the group that had additional breathing exercises had significant improvements in lower extremity flexibility. Both groups had significant improvements in overall pulmonary function, including vital capacity, forced vital capacity, forced expiratory volume, and peak expiratory flow rate. But only the group that had additional breathing exercises had significant improvements in respiratory muscle strength and maximum inspiratory pressure.

 

The results demonstrated that yoga practice produces improvements in strength and flexibility and in respiratory function. But, adding breathing exercises produces additional benefits in flexibility and respiratory function. The study did not include a control group that performed a different exercise with equivalent intensity. So, it can’t be determined whether the physical improvements were specific to yoga or would have occurred with any equivalent exercise. But they do suggest that practicing yoga has physical benefits for strength, flexibility, and respiratory function, and including yogic breathing exercises helps to maximize the effectiveness of the yoga practice.

 

So, improve physical and respiratory function with yoga.

 

“yoga breathing: pranayama. It’s the art of breathing. Taking breathing to the next level. Learning different breathing techniques can add more beneficial oxygen to our bodies, aid in digestion, hone our concentration skills, calm our nerves, and much more.” – Gaiam

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts Yamamoto-Morimoto and on Twitter @MindfulResearch

 

Study Summary

 

Yamamoto-Morimoto, K., Horibe, S., Takao, R., & Anami, K. (2019). Positive Effects of Yoga on Physical and Respiratory Functions in Healthy Inactive Middle-Aged People. International journal of yoga, 12(1), 62-67.

 

Abstract

Context:

Yoga improves physical and respiratory functions in healthy inactive middle-aged people.

Aim:

This study aimed to assess the effects of 8 weeks of asana and asana with pranayama lessons in order to clarify the influence of two different combinations of yoga practice on physical and respiratory functions in healthy inactive middle-aged people.

Subjects and Methods:

A total of 28 participants (mean age: 52.7 years) were divided into a yoga asana (YA) group and YA with pranayama (YAP) group. Participants attended a 70-min session once a week for 8 weeks. The YA group practiced basic asana without specific breathing instructions, while the YAP group practiced basic asanawith specific breathing instructions (pranayama). Respiratory function was measured with an autospirometer. Physical function assessments included the 30-s chair stand test and upper and lower extremity flexibility. All tests were assessed at baseline and after 8 weeks of intervention.

Statistical Analysis:

Changes in scores were analyzed with the paired t-test for each group. Pre-post results were compared for all the measured values. P < 0.05 was considered statistically significant.

Results:

Both groups showed significant improvements in physical and overall respiratory functions after the 8-week yoga intervention. However, the maximal inspiratory pressure and lower extremity flexibility improved only in the YAP group.

Conclusions:

The 8-week yoga intervention for healthy inactive middle-aged people improved the overall respiratory and physical functions, and the inclusion of pranayama had the added benefit of improving inspiratory muscle strength and global body flexibility.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329219/

 

Improve Physiological Relaxation in Children with Autism Spectrum Disorder with Yoga

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Improve Physiological Relaxation in Children with Autism Spectrum Disorder with Yoga

 

By John M. de Castro, Ph.D.

 

“mindfulness has emerged as a way of treating children and adolescents with conditions ranging from ADHD to anxiety, autism spectrum disorders, depression and stress. And the benefits are proving to be tremendous.” – Juliann Garey

 

Autism spectrum disorder (ASD) is a developmental disability that tends to appear during early childhood and affect the individual throughout their lifetime. It affects a person’s ability to communicate, and interact with others, delays learning of language, makes eye contact or holding a conversation difficult, impairs reasoning and planning, narrows and intensifies interests, produces poor motor skills and sensory sensitivities, and is frequently associated with sleep and gastrointestinal problems. ASD is a serious disorder that impairs the individual’s ability to lead independent lives including complete an education, enter into relationships or find and hold employment. It is also difficult and stressful for the caregivers.

 

The diagnosis of autism spectrum disorder (ASD) has been increasing markedly over the last couple of decades. It is currently estimated that over 1% of the world population has autism spectrum disorder (ASD). Its causes are unknown and there are no known cures. Treatment is generally directed at symptoms and can include behavioral therapies and drug treatments. Clearly, there is a need for effective alternative treatment options. A promising treatment is mindfulness training. It has been shown to be helpful in treating ASD.

 

A characterizing feature of ASD is dysfunction in the Autonomic Nervous System (ANS) which is composed of 2 divisions. The sympathetic division underlies activation while the parasympathetic division underlies relaxation. When these divisions are out of balance the individual may be overly stressed or overly sedentary. Appropriate balance is important for health and well-being. A measure of balance is provided by the variability of the heart rate. Moderated heart rate variability reflects balance in the autonomic nervous system. So, changes in heart rate variability may be a good measure of relief of ASD by Yoga practice.

 

In today’s Research News article “Effect of Yoga Intervention on Short-Term Heart Rate Variability in Children with Autism Spectrum Disorder.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329223/ ), Vidyashree and colleagues recruited children aged 8 to 14 years who were diagnosed with Autism Spectrum Disorder. All the children participated in continuing physical rehabilitation training. They were randomly assigned to receive either an additional 40-minute daily yoga practice for 3 months or no additional treatment. Yoga practice consisted of postures and chanting. The children were measured for the variability of their heart rate over 15 minutes with an electrocardiagram (ECG) measurement.

 

They found that after the 3 months of yoga practice there was a significant reduction in the resting heart rate of the children. Importantly, they found that a number of measures of heart rate variability were significantly improved in the children who practiced yoga including low frequency to high frequency ratio signaling a modulation of autonomic nervous system (ANS) activity. This signals a reduction in sympathetic activation and an increase in parasympathetic relaxation.

 

These findings suggest that yoga practice may significantly reduce imbalance in the ANS that characterizes children with Autism Spectrum Disorder (ASD). It is possible that this modulation may underlie the ability of yoga practice in improving ASD. There is a need for more research on this question. But the results are suggestive that yoga practice may be a beneficial treatment for children with ASD.

 

So, improve physiological relaxation in children with Autism Spectrum Disorder with yoga.

 

“mindfulness practices may be a viable technique in not only improving behavioral and cognitive responses in those with ASD, but also the overall well-being of their caregivers.” – Krupa Patel

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Vidyashree, H. M., Maheshkumar, K., Sundareswaran, L., Sakthivel, G., Partheeban, P. K., & Rajan, R. (2019). Effect of Yoga Intervention on Short-Term Heart Rate Variability in Children with Autism Spectrum Disorder. International journal of yoga, 12(1), 73-77.

 

Abstract

Background:

Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by impairment in social interactions, communication, restricted, and repetitive behaviors. Evidence-based treatment options for ASD are limited. Yoga is practiced by over 20 million people worldwide, and multiple studies have investigated yoga as a possible effective intervention for children with ASD.

Aim:

The aim of this study is to investigate the effect of yoga intervention on short-term heart rate variability (HRV) in children with ASD.

Methodology:

In this study, 50 children (38 boys and 12 girls) with ASD were recruited from Swabhimaan Trust, Palavakkam, Chennai. They were randomly grouped into ASD with yoga intervention group (n = 25) and ASD without yoga intervention group (n = 25) by simple lottery method. Yoga group children underwent yoga training for 3 months, and the control group did not receive any such training. For short-term HRV, 15 min electrocardiogram recording in sitting posture was recorded in lead II using a simple analog amplifier.

Results:

In HRV, time domain parameters such as mean RR interval (0.72 [0.74] to 0.94 [0.92]), standard deviation of the NN intervals (52.04 [54.23] to 74.48 [72.80]), and root of the mean squared differences of successive NN interval (32.60 [34.40] to 40.83 [42.90]) significantly increased in ASD children after yoga intervention. In frequency-domain parameters, high frequency (HF) in n. u (48.08 [47.24] to 58.37 [59.22]) shows a significant increase and low frequency (LF) in n. u (52.4 [51.82] to 40.51 [40.12]), and LF/HF ratio (1.29 [1.31] to 0.78 [0.79]) shows a significant decrease in ASD with yoga intervention group children after 3 months of yoga training.

Conclusion:

Yoga interventions have been successful in bringing parasympathetic dominance in ASD children, and the greater advantage is being a noninvasive way of intervention to support children with ASD and help them to achieve physiological as well as psychological balance.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329223/

 

Improve Severe Mental Illness with Yoga and Mindfulness

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Improve Severe Mental Illness with Yoga and Mindfulness

 

By John M. de Castro, Ph.D.

 

“yoga does in fact have positive effects on mild depression and sleep problems, and it improves the symptoms of psychiatric disorders like schizophrenia and ADHD among patients using medication.” – Alexandra Sifferin

 

Psychoses are mental health problems that cause people to perceive or interpret things differently from those around them. This might involve hallucinations; seeing and, in some cases, feeling, smelling or tasting things that aren’t objectively there, or delusions; unshakable beliefs that, when examined rationally, are obviously untrue. The combination of hallucinations and delusional thinking can often severely disrupt perception, thinking, emotion, and behavior, making it difficult if not impossible to function in society without treatment. Psychoses appear to be highly heritable and involves changes in the brain. Psychoses are very difficult to treat with psychotherapy and are usually treated with antipsychotic drugs. These drugs, however, are not always effective, sometimes lose effectiveness, and can have some difficult side effects. Hence, there is a need for safe and effective alternative treatments for psychosis.

 

Clinically diagnosed depression is the most common mental illness, affecting over 6% of the population. Major depression can be quite debilitating. It is also generally episodic, coming and going. Some people only have a single episode but most have multiple reoccurrences of depression.  Depression can be difficult to treat. It is usually treated with antidepressant medication. But, of patients treated initially with drugs only about a third attained remission of the depression. After repeated and varied treatments including drugs, therapy, exercise etc. only about two thirds of patients attained remission. But drugs often have troubling side effects and can lose effectiveness over time.

 

Clearly, there is a need for treatment alternatives that can be effective alone or in combination with drugs. Both mindfulness and yoga training has been shown to be beneficial for patients with psychosis and with major depression. It is important at this point to step back and review the published studies of the application of mindfulness and yoga practices for the treatment of severe mental illnesses, In today’s Research News article “Role of Yoga and Mindfulness in Severe Mental Illnesses: A Narrative Review.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329226/ ), Sathyanarayanan and colleagues review and summarize 49 published research studies on the effectiveness of mindfulness and yoga practices for the treatment of severe mental illnesses.

 

They report that the research finds that both mindfulness practices and yoga practice in combination with antipsychotic medications significantly reduces both the positive and negative symptoms of schizophrenia and other psychotic disorders, improves the patient’s ability to effectively engage in everyday activities and also improves higher level thought processes, cognition. With Bipolar Disorder they report that there are only a very small number of studies that suggest improvements but more research is needed. With Major Depressive Disorders both mindfulness and yoga practices have been shown to produce significant reductions in depression alone or in combination with anti-depressive medications.

 

Hence, they find that the current published research supports the use of either mindfulness or yoga practices for the treatment of severe mental illnesses. There is clearly a need for more research, but the studies to date are very encouraging. They suggest that these practices are safe and effective whether used alone or in combination with drugs and may then be a needed alternative treatment to drugs.

 

So, improve severe mental illness with yoga and mindfulness.

 

“Yoga can be an incredible tool for self-growth, empowerment, healing, and health for those with mental disorders.” – Zoie Kanakis

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Sathyanarayanan, G., Vengadavaradan, A., & Bharadwaj, B. (2019). Role of Yoga and Mindfulness in Severe Mental Illnesses: A Narrative Review. International journal of yoga, 12(1), 3-28.

 

Abstract

Background:

Yoga has its origin from the ancient times. It is an integration of mind, body, and soul. Besides, mindfulness emphasizes focused awareness and accepting the internal experiences without being judgemental. These techniques offer a trending new dimension of treatment in various psychiatric disorders.

Aims:

We aimed to review the studies on the efficacy of yoga and mindfulness as a treatment modality in severe mental illnesses (SMIs). SMI includes schizophrenia, major depressive disorder (MDD), and bipolar disorder (BD).

Methods:

We conducted a literature search using PubMed, Google Scholar, and Cochrane Library with the search terms “yoga,” “meditation,” “breathing exercises,” “mindfulness,” “schizophrenia spectrum and other psychotic disorders,” “depressive disorder,” and “bipolar disorder” for the last 10-year period. We also included relevant articles from the cross-references.

Results:

We found that asanas and pranayama are the most commonly studied forms of yoga for schizophrenia. These studies found a reduction in general psychopathology ratings and an improvement in cognition and functioning. Some studies also found modest benefits in negative and positive symptoms. Mindfulness has not been extensively tried, but the available evidence has shown benefits in improving psychotic symptoms, improving level of functioning, and affect regulation. In MDD, both yoga and mindfulness have demonstrated significant benefit in reducing the severity of depressive symptoms. There is very sparse data with respect to BD.

Conclusion:

Both yoga and mindfulness interventions appear to be useful as an adjunct in the treatment of SMI. Studies have shown improvement in the psychopathology, anxiety, cognition, and functioning of patients with schizophrenia. Similarly, both the techniques have been established as an effective adjuvant in MDD. However, more rigorously designed and larger trials may be necessary, specifically for BD.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6329226/

 

Improve Type 2 Diabetes with Yoga

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Improve Type 2 Diabetes with Yoga

 

By John M. de Castro, Ph.D.

 

“Stress elevates blood sugar, which can lead to more diabetes complications. Yoga helps us center ourselves, and centering calms us and can help keep blood sugar levels balanced.” – Janet Zappe

 

Diabetes is a major health issue. It is estimated that 30 million people in the United States and nearly 600 million people worldwide have diabetes and the numbers are growing. Type II Diabetes results from a resistance of tissues, especially fat tissues, to the ability of insulin to promote the uptake of glucose from the blood. As a result, blood sugar levels rise producing hyperglycemia. Diabetes is heavily associated with other diseases such as cardiovascular disease, heart attacks, stroke, blindness, kidney disease, and circulatory problems leading to amputations. As a result, diabetes doubles the risk of death of any cause compared to individuals of the same age without diabetes.

 

Type 2 diabetes is a common and increasingly prevalent illness that is largely preventable. One of the reasons for the increasing incidence of Type 2 Diabetes is its association with overweight and obesity which is becoming epidemic in the industrialized world. A leading cause of this is a sedentary life style. Unlike Type I Diabetes, Type II does not require insulin injections. Instead, the treatment and prevention of Type 2 Diabetes focuses on diet, exercise, and weight control. Recently, mindfulness practices have been shown to be helpful in managing diabetes. A mindfulness practice that combines mindfulness with exercise is yoga and it has been shown to be helpful in the treatment of Type II Diabetes. Hence, there is a need to step back and review what has been learned regarding the effectiveness of yoga practice for Type 2 Diabetes.

 

In today’s Research News article “The effects of yoga among adults with type 2 diabetes: A systematic review and meta-analysis.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653446/ ), Thind and colleagues review summarize and perform a meta-analysis of the published research literature of the effectiveness of yoga practice for Type 2 Diabetes. They identified 23 published studies that included a control group.

 

They found that the research studies reported that compared to control participants, the patients who practiced yoga had significantly lower blood glucose levels and significantly improved glycemic control as evidenced by blood levels of HbA1c and/or FBG. The yoga participants also had significantly improved blood fat levels including lower levels of total cholesterol, very-low density lipoprotein, low-density lipoprotein, and triglyceride levels and increased high-density lipoprotein levels. In addition, the after yoga training the patients had significantly lower blood pressure and body mass index, and lower levels of the stress hormone cortisol.

 

These are remarkable findings, but most of these studies did not contain an active exercise control condition. So, the great benefits of yoga practice may be due to the physical exercise provided by yoga rather than anything specific to yoga. More research is needed to clarify this point. But, regardless, yoga practice has important benefits for adult patients with Type 2 Diabetes improving blood glycemic and lipid control, lowering blood pressure, body size, and stress hormone levels.

 

So, improve Type 2 Diabetes with Yoga.

 

“But yoga’s benefits for those with diabetes aren’t just physical: the process can help patients with the condition or its pre-indicators on more fundamental levels as well. By calming the awareness and integrating the mind with the body, yoga can relieve the daily stresses that often lie at the heart of diabetic symptoms.” – YogaU

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Thind, H., Lantini, R., Balletto, B. L., Donahue, M. L., Salmoirago-Blotcher, E., Bock, B. C., & Scott-Sheldon, L. (2017). The effects of yoga among adults with type 2 diabetes: A systematic review and meta-analysis. Preventive medicine, 105, 116-126.

 

Abstract

The purpose of this meta-analysis was to examine the effects of yoga for glycemic control among adults with type 2 diabetes (T2DM). Comprehensive electronic databases searches located 2559 unique studies with relevant key terms. Studies were included if they (1) evaluated a yoga intervention to promote T2DM management, (2) used a comparison group, (3) reported an objective measure of glycemic control at post-intervention, and (4) had follow-up length or post-test of at least 8 weeks from baseline. Independent raters coded participant, design and methodological characteristics and intervention content. Summary effect sizes and 95% confidence intervals (CI) were calculated. Twenty-three studies with 2473 participants (mean age = 53 years; 43% women) met eligibility criteria. Compared with controls, yoga participants were successful in improving their HbA1c (d + = 0.36, 95% CI = 0.16, 0.56; k = 16), FBG (d+ = 0.58, 95% CI = 0.40, 0.76; k = 20), and PPBG (d + = 0.40, 95% CI = 0.23, 0.56; k = 14). Yoga was also associated with significant improvements in lipid profile, blood pressure, body mass index, waist/hip ratio and cortisol levels. Overall, studies satisfied an average of 41% of the methodological quality (MQ) criteria; MQ score was not associated with any outcome (Ps > 0.05). Yoga improved glycemic outcomes and other risk factors for complications in adults with T2DM relative to a control condition. Additional studies with longer follow-ups are needed to determine the long-term efficacy of yoga for adults with T2DM.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653446/

 

Reduce Stress and Improve Autonomic Nervous System Function with Tai Chi or Yoga

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Reduce Stress and Improve Autonomic Nervous System Function with Tai Chi or Yoga

 

By John M. de Castro, Ph.D.

 

“The rate of individuals suffering from autonomic nervous system dysfunctions is fast on the rise, due to our high stress and stimulative 21st-century lifestyles. However unknown to many practitioners, there are several natural therapies which are proven to help support the balance of the autonomic nervous system such as meditation and often have fewer side-effects and are better tolerated than many pharmaceutical medications.” –  NaturalHealthBlogger

 

There is an accumulating volume of research findings to demonstrate that Mind-body practices have highly beneficial effects on the health and well-being of humans. These include yoga, tai chi, and qigong, among many others. Because of their proven benefits the application of these practices to relieving human suffering has skyrocketed. Tai Chi has been practiced for thousands of years with benefits for health and longevity. Tai Chi training is designed to enhance function and regulate the activities of the body through regulated breathing, mindful concentration, and gentle movements.  Yoga practice has been shown to have a large number of beneficial effects on the psychological, emotional, and physical health of the individual and is helpful in the treatment of mental and physical illness.

 

One way that these Mind-body practices may have their beneficial effects is by providing balance in the autonomic nervous system. The sympathetic division underlies activation while the parasympathetic division underlies relaxation. When these divisions are out of balance the individual may be overly stressed or overly sedentary. Appropriate balance is important for health and well-being. A measure of balance is provided by the variability of the heart rate. Moderated heart rate variability reflects balance in the autonomic nervous system.

 

In today’s Research News article “Effects of Mind⁻Body Exercises (Tai Chi/Yoga) on Heart Rate Variability Parameters and Perceived Stress: A Systematic Review with Meta-Analysis of Randomized Controlled Trials.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6262541/ ), Zou and colleagues review, summarize and perform a meta-analysis of the published randomized controlled trials investigating the effects of tai chi and yoga on a measure of autonomic balance; heart rate variability. They discovered 17 research publications reporting on research studies of fair to high quality.

 

They report that after both tai chi or yoga practice there are large significant reductions in perceived stress levels. Also, after practice there were small, albeit significant reductions in the normalized low-frequency component of heart rate variation and the ratio of low frequency to high frequency variations and significant increases in the normalized high-frequency component. These components are thought to be indicative of sympathetic and vagal modulation, sympathetic modulation, and sympathetic activity. These effects on heart rate variation components suggest that after tai chi and yoga practice there is better balance in the autonomic nervous system. Additionally, the published studies indicate that while both tai chi and yoga practice decrease stress and improve autonomic balance, that a minimum of 90 minutes per week of yoga practice produces better results.

 

These results are interesting and important. They suggest that tai chi and especially yoga practice promote health and well-being and may do so by reducing perceived levels of stress and balancing the autonomic nervous system. Yoga practice is generally a more intense exercise and it is likely that this greater intensity of exercise is responsible for yoga’s superiority. But Tai Chi is gentle, safe, and easily practiced conveniently without a professional teacher. Hence, it may be better adapted to integration into the daily lifestyle of the individual.

 

So, reduce stress and improve autonomic nervous system function with tai chi or yoga.

 

“Practicing yoga is an excellent way to stimulate and bring circuitry to the important parasympathetic nervous system. The gentle movements and slow rhythmic breathing slow the heart and blood pressure. Yoga redirects blood flow to the reproductive and digestive organs. Regular yoga practice results in a sustained state of strength and health, as well as mind and body balance. Tai Chi is widely used for its variety of health benefits and its adaptability to any age or level of fitness. It is an effective technique that enhances your body’s ability to use the mind to get in touch with the body through the nervous system. The results of continued practice include increased awareness, strengthened nerves, and better coordination, to name a few.” – Aleksandra Eifler

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Zou, L., Sasaki, J. E., Wei, G. X., Huang, T., Yeung, A. S., Neto, O. B., Chen, K. W., … Hui, S. S. (2018). Effects of Mind⁻Body Exercises (Tai Chi/Yoga) on Heart Rate Variability Parameters and Perceived Stress: A Systematic Review with Meta-Analysis of Randomized Controlled Trials. Journal of clinical medicine, 7(11), 404. doi:10.3390/jcm7110404

 

Abstract

Background: Heart rate variability (HRV) as an accurate, noninvasive measure of the Autonomous Nervous System (ANS) can reflect mental health (e.g., stress, depression, or anxiety). Tai Chi and Yoga (Tai Chi/Yoga), as the most widely practiced mind–body exercises, have shown positive outcomes of mental health. To date, no systematic review regarding the long-lasting effects of Tai Chi/Yoga on HRV parameters and perceived stress has been conducted. Objective: To critically evaluate the existing literature on this topic. Methods: Five electronic databases (Web of Science, PubMed, Scopus, SportDiscus and Cochrane Library) were searched from the start of the research project to July 2018. Study selection, data extraction, and study quality assessment were independently carried out by two reviewers. The potentially identified randomized controlled trials (RCT) reported the useful quantitative data that were included only for meta-analysis. Results: meta-analysis of 17 medium-to-high quality RCTs showed significantly beneficial effects on HRV parameters (normalized low-frequency, Hedge’s g = −0.39, 95% CI −0.39 to −0.56, p < 0.001, I2 = 11.62%; normalized high-frequency, Hedge’s g = 0.37, 95% CI 0.22 to −0.52, p < 0.001, I2 = 0%; low-frequency to high-frequency ratio, Hedge’s g = −0.58, 95% CI −0.81 to −0.35, p < 0.001, I2 = 53.78%) and stress level (Hedge’s g = −0.80, 95% CI −1.17 to −0.44, p < 0.001, I2 = 68.54%). Conclusions: Stress reduction may be attributed to sympathetic-vagal balance modulated by mind–body exercises. Tai Chi/Yoga could be an alternative method for stress reduction for people who live under high stress or negative emotions.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6262541/

 

Reduce Stress and Improve Autonomic Nervous System Function with Tai Chi or Yoga

psyjdc Leave a comment

Reduce Stress and Improve Autonomic Nervous System Function with Tai Chi or Yoga

 

By John M. de Castro, Ph.D.

 

“The rate of individuals suffering from autonomic nervous system dysfunctions is fast on the rise, due to our high stress and stimulative 21st-century lifestyles. However unknown to many practitioners, there are several natural therapies which are proven to help support the balance of the autonomic nervous system such as meditation and often have fewer side-effects and are better tolerated than many pharmaceutical medications.” –  NaturalHealthBlogger

 

There is an accumulating volume of research findings to demonstrate that Mind-body practices have highly beneficial effects on the health and well-being of humans. These include yoga, tai chi, and qigong, among many others. Because of their proven benefits the application of these practices to relieving human suffering has skyrocketed. Tai Chi has been practiced for thousands of years with benefits for health and longevity. Tai Chi training is designed to enhance function and regulate the activities of the body through regulated breathing, mindful concentration, and gentle movements.  Yoga practice has been shown to have a large number of beneficial effects on the psychological, emotional, and physical health of the individual and is helpful in the treatment of mental and physical illness.

 

One way that these Mind-body practices may have their beneficial effects is by providing balance in the autonomic nervous system. The sympathetic division underlies activation while the parasympathetic division underlies relaxation. When these divisions are out of balance the individual may be overly stressed or overly sedentary. Appropriate balance is important for health and well-being. A measure of balance is provided by the variability of the heart rate. Moderated heart rate variability reflects balance in the autonomic nervous system.

 

In today’s Research News article “Effects of Mind⁻Body Exercises (Tai Chi/Yoga) on Heart Rate Variability Parameters and Perceived Stress: A Systematic Review with Meta-Analysis of Randomized Controlled Trials.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6262541/ ), Zou and colleagues review, summarize and perform a meta-analysis of the published randomized controlled trials investigating the effects of tai chi and yoga on a measure of autonomic balance; heart rate variability. They discovered 17 research publications reporting on research studies of fair to high quality.

 

They report that after both tai chi or yoga practice there are large significant reductions in perceived stress levels. Also, after practice there were small, albeit significant reductions in the normalized low-frequency component of heart rate variation and the ratio of low frequency to high frequency variations and significant increases in the normalized high-frequency component. These components are thought to be indicative of sympathetic and vagal modulation, sympathetic modulation, and sympathetic activity. These effects on heart rate variation components suggest that after tai chi and yoga practice there is better balance in the autonomic nervous system. Additionally, the published studies indicate that while both tai chi and yoga practice decrease stress and improve autonomic balance, that a minimum of 90 minutes per week of yoga practice produces better results.

 

These results are interesting and important. They suggest that tai chi and especially yoga practice promote health and well-being and may do so by reducing perceived levels of stress and balancing the autonomic nervous system. Yoga practice is generally a more intense exercise and it is likely that this greater intensity of exercise is responsible for yoga’s superiority. But Tai Chi is gentle, safe, and easily practiced conveniently without a professional teacher. Hence, it may be better adapted to integration into the daily lifestyle of the individual.

 

So, reduce stress and improve autonomic nervous system function with tai chi or yoga.

 

“Practicing yoga is an excellent way to stimulate and bring circuitry to the important parasympathetic nervous system. The gentle movements and slow rhythmic breathing slow the heart and blood pressure. Yoga redirects blood flow to the reproductive and digestive organs. Regular yoga practice results in a sustained state of strength and health, as well as mind and body balance. Tai Chi is widely used for its variety of health benefits and its adaptability to any age or level of fitness. It is an effective technique that enhances your body’s ability to use the mind to get in touch with the body through the nervous system. The results of continued practice include increased awareness, strengthened nerves, and better coordination, to name a few.” – Aleksandra Eifler

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Zou, L., Sasaki, J. E., Wei, G. X., Huang, T., Yeung, A. S., Neto, O. B., Chen, K. W., … Hui, S. S. (2018). Effects of Mind⁻Body Exercises (Tai Chi/Yoga) on Heart Rate Variability Parameters and Perceived Stress: A Systematic Review with Meta-Analysis of Randomized Controlled Trials. Journal of clinical medicine, 7(11), 404. doi:10.3390/jcm7110404

 

Abstract

Background: Heart rate variability (HRV) as an accurate, noninvasive measure of the Autonomous Nervous System (ANS) can reflect mental health (e.g., stress, depression, or anxiety). Tai Chi and Yoga (Tai Chi/Yoga), as the most widely practiced mind–body exercises, have shown positive outcomes of mental health. To date, no systematic review regarding the long-lasting effects of Tai Chi/Yoga on HRV parameters and perceived stress has been conducted. Objective: To critically evaluate the existing literature on this topic. Methods: Five electronic databases (Web of Science, PubMed, Scopus, SportDiscus and Cochrane Library) were searched from the start of the research project to July 2018. Study selection, data extraction, and study quality assessment were independently carried out by two reviewers. The potentially identified randomized controlled trials (RCT) reported the useful quantitative data that were included only for meta-analysis. Results: meta-analysis of 17 medium-to-high quality RCTs showed significantly beneficial effects on HRV parameters (normalized low-frequency, Hedge’s g = −0.39, 95% CI −0.39 to −0.56, p < 0.001, I2 = 11.62%; normalized high-frequency, Hedge’s g = 0.37, 95% CI 0.22 to −0.52, p < 0.001, I2 = 0%; low-frequency to high-frequency ratio, Hedge’s g = −0.58, 95% CI −0.81 to −0.35, p < 0.001, I2 = 53.78%) and stress level (Hedge’s g = −0.80, 95% CI −1.17 to −0.44, p < 0.001, I2 = 68.54%). Conclusions: Stress reduction may be attributed to sympathetic-vagal balance modulated by mind–body exercises. Tai Chi/Yoga could be an alternative method for stress reduction for people who live under high stress or negative emotions.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6262541/