In the West, Yoga is best known as a form of physical exercise. Actually, the physical postures, called asanas, are designed to develop not only physical, but also mental and spiritual well-being. Breathing techniques, balancing exercises and progressive relaxation are a part of every class. Flexibility, strength and balance of the mind, body and spirit are all enhanced through regular practice. Over time, Yoga restores the body to optimum function, relieving many health complaints. It is especially effective at addressing stress-related concerns, rehabilitating physical injuries and areas of weakness and improving posture. Yoga is practiced barefoot on a yoga mat, which is typically sticky to prevent sliding.