I'm a yoga teacher and MAPP student looking to write my dissertation on the links between yoga practice and flourishing/wellbeing. I'm in the very early stages of looking at this topic.
Check the Preventive Medicine Research Institute, Sausalito, California. First research: Coronary Artery Disease-- The life style heart trial project, proved CAD is reversible with life style changes. Considerable literature and studies resulted. PI is Dean Ornish, MD. Next was prostate cancer trial, currently Alzheimer's, all rich with details. Also, check out the International Association of Yoga Therapy, and the resources- a journal and conferences drawing research and practitioners spurring the field.. India has been publishing for decades, as has Europe so you will find ample evidence for your ideas.