A lead science writer for "The""New York Times"--and lifelong yoga practitioner--examines centuries of history and research to scrutinize the claims made about yoga for health, fitness, emotional wellbeing, sex, weight loss, healing, and creativity. He reveals what is real and what is illusory, in the process exposing moves that can harm or even kill. Five years in the making, "The Science of Yoga" draws on a hidden wealth of discovery, drama, and surprising fact to cut through the fog that surrounds contemporary yoga and to show--for the first time--what is uplifting and beneficial and what is delusional, flaky, and dangerous. At heart, it illuminates the risks and rewards. Broad describes yoga as a burgeoning global industry that attracts not only curious scientists but millions of true believers and charismatic hustlers. He takes the reader on a whirlwind tour of unknown yoga that goes from old archives in Calcutta to world capitals of medical research, from storied ashrams to spotless laboratories, from sweaty yoga studios with master teachers to the cozy offices of yoga healers. In the process, he shatters myths, lays out unexpected benefits, and offers a compelling vision of how the discipline can be improved.