- Risk factors for cardiovascular disease improved more in those doing yoga than in those doing no exercise. When compared to no exercise, yoga was associated with significant improvement in each of the primary outcome risk factors measured: body mass index was reduced by 0.77 kg/m2 (measured as a “mean difference”), systolic blood pressure reduced by.21 mm Hg, low-density (bad) lipoprotein cholesterol reduced by 12.14 mg/dl, and high-density (good) lipoprotein cholesterol increased by 3.20 mg/dl. There were also significant changes seen in secondary endpoints — body weight fell by 2.32 kg, diastolic blood pressure by 4.9 mm Hg, total cholesterol by 18.48 mg/dl, and heart rate by.27 beats/min. However, no improvements were found in parameters of diabetes (fasting blood glucose and glycosylated hemoglobin).
- Yoga was found to have comparable effects on risk factors as aerobic exercise. The investigators note that this might be because of yoga’s impact on stress reduction, “leading to positive impacts on neuroendocrine status, metabolic and cardio-vagal function.”
- Risk factor improvements (in BMI, blood pressure, lipid levels) were significant when yoga was used in addition to medication. Among patients with existing coronary heart disease, yoga provided a statistically significant benefit in lowering LDL cholesterol when added to medication (statins and lipid-lowering drugs).
Commenting on the results, senior author Professor Myriam Hunink from Erasmus University Medical Center, Rotterdam, and Harvard School of Public Health, Boston, said that, although the evidence of yoga’s beneficial effect in cardiovascular health is growing, a physiological explanation for this effect remains unclear. “Also unclear,” she added, “are the dose-response relationship and the relative costs and benefits of yoga when compared to exercise or medication. However, these results indicate that yoga is potentially very useful and in my view worth pursuing as a risk improvement practice.”
My Take: In view of yoga’s ease of uptake, evidence supports yoga’s acceptability to “patients with lower physical tolerance like those with pre-existing cardiac conditions, the elderly, or those with musculoskeletal or joint pain.” Yoga has the potential to be a cost-effective treatment and prevention strategy given its low cost, lack of expensive equipment or technology, potential greater adherence and health-related quality of life improvements, and possible accessibility to larger segments of the population.” I’m Dr. Michael Hunter.
- P. Chu, R. A. Gotink, G. Y. Yeh, S. J. Goldie, M. M. Hunink. The effectiveness of yoga in modifying risk factors for cardiovascular disease and metabolic syndrome: A systematic review and meta-analysis of randomized controlled trials. European Journal of Preventive Cardiology, 2014; DOI: 10.1177/2047487314562741
- European Society of Cardiology. “Yoga has potential to reduce risk factors of cardiovascular disease.” ScienceDaily. ScienceDaily, 15 December 2014. www.sciencedaily.com/releases/2014/12/141215203049.htm.