Yoga is a healing system of theory and practice, its a combination of breathing exercises, physical postures, and meditation, practiced for over few thousand years. Yoga is considered a mind-body intervention that is used to reduce the health effects of generalized stress. Yoga is believed to calm the nervous system and balance the body, mind, and spirit. It is thought by its practitioners to prevent specific diseases and maladies by keeping the energy meridians open and life energy (Prana) flowing. Yoga has been used to lower blood pressure, reduce stress, and improve coordination, flexibility, concentration, sleep, and digestion.