Several questions were raised when Yogrishi Swami Ramdev Ji announced that ‘yoga is complete medical science’. ‘Yoga in synergy with medical science’ is the answer to those queries and doubts as it is based on modern medical science with scientific facts and proofs. This is world's unique and best treatise with the presentation of massive effects of Yoga on the basis of proofs and various examples. This book is the outcome of meticulous efforts done by Patanjali Yogpeeth in order to present various scientific standards used to test and validate this ancient system of yoga and to firmly establish Yoga as a science in this era of modern scientific world. This is the first attempt to present Yoga backed by currently available scientific evidence obtained with the limited resources.