Yoga and prevention of type 2 diabetes - The Indian Prevention of Diabetes Study (IPDS)

Background: Short term studies have reported that yoga could be beneficial in preventing diabetes. We evaluated long term effectiveness of yoga in reducing the risk of type 2 diabetes. Methods: This open labelled randomized controlled trial was conducted across five medical centers. Adults diagnosed with prediabetes following an oral glucose tolerance test were randomly assigned to receive a structured yoga intervention consisting of 40 minutes of specific yoga asanas pranayama in addition to standard lifestyle measures or standard lifestyle measures alone. The primary outcome of incident diabetes was compared in both groups at the end of the 3-year intervention period using intention-to-treat analysis. Results: A total of 974 individuals were randomized (488 to the yoga + lifestyle group-group1 and 486 to the Lifestyle alone group-group2). After 3 years of follow-up, there was a 39.2 % reduction of the relative risk of diabetes with yoga (11.5% in group1 vs 18.9% in group 2). Cox proportional hazard model analysis revealed a significantly higher odds ratio of 1.74 (95 % CI 1.25-2.43) of developing diabetes in the lifestyle alone group compared to those who also performed yoga. Adherence to yoga was good with 77 % of individuals performing yoga for more than 75 % of the time. Conclusions: Structured yoga intervention along with standard lifestyle measures significantly reduces risk of type 2 diabetes when compared with those given lifestyle measures alone.