Reason for Yoga exercise.

"Many yoga practices counter the fight-or-flight response and invite the body to move in the opposite direction toward peace and calm. Gentle stretching lengthens your muscles, reducing physical tension. Yoga breathing slows your respiration. Inverted postures can help lower your blood pressure by decreasing your heart rate, relaxing your arteries and reducing levels of the stress hormone noradrenaline. Resting yoga postures allow you to let go of physical and mental effort. Meditative practice help you put fear and anger into perspective. With increased calm and relaxation comes a decrease in your level of cortisol, an adrenal hormone that inhibits immune system function. This keeps your body at optimal alert against disease."