The system of yoga provides many opportunities to develop relaxation techniques, which can help undo the effects of stress and tension. Deep relaxation is not a “zoning out” activity, where you space out and let the mind wander or enter a sleep state. It is a state of alert consciousness, which is deeply refreshing and energizing. The nervous system, respiratory system, circulatory system, and digestive system receive the message to slow down, relax, and regenerate.