The 12 basic poses or asanas are much more than just stretching. They open the energy channels, chakras and psychic centers of the body while increasing flexibility of the spine, strengthening bones and stimulating the circulatory and immune systems. Along with proper breathing or pranayama, asanas also calm the mind and reduce stress. With regular practice one can ensure overall physical and mental health and the possible prevention of diseases such as diabetes, hypertension and arthritis. In time, performing the poses slowly and consciously becomes a mental exercise in concentration and meditation.