Yoga has been practiced in India in various forms for thousands of years. Its purpose is to strengthen the body and make it more flexible, as well as to calm the mind and awaken the spirit. It does this through gentle physical poses, deep, steady breathing, and meditation practice. Yoga is thought to be beneficial for mental stress, back pain, rheumatoid arthritis, asthma, hypertension, and other disorders. People of all ages can do yoga, and yoga poses can be adapted for people with disabilities or special needs. Follow the links below to find WebMD's comprehensive coverage about yoga, its health benefits, and much more.