Yoga, a regime of mental and physical training, is part of Ayurveda, the traditional Indian health system, and was originally a preparation for mental and spiritual development. Various forms are now popular in developed countries, and are often initially valued for their ability to increase suppleness and relieve stress. Most doctors accept the benefits of
yoga, and studies have shown it may relieve
asthma, arthritis, and heart conditions. Interest is now growing in
yoga therapy, which uses specific postures to treat particular conditions.