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The effects of yoga among adults with type 2 diabetes: a systematic review and meta-analysis [with consumer summary] |
Thind H, Lantini R, Balletto BL, Donahue ML, Salmoirago-Blotcher E, Bock BC, Scott-Sheldon LAJ |
Preventive Medicine 2017 Dec;105:116-126 |
systematic review |
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 2,559 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 2,473 participants (mean age 53years; 43% women) met eligibility criteria. Compared with controls, yoga participants were successful in improving their HbA1c (d+ = 0.36, 95% CI 0.16 to 0.56; k = 16), FBG (d+ = 0.58, 95% CI 0.40 to 0.76; k = 20), and PPBG (d+ = 0.40, 95% CI 0.23 to 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.
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