Why practice Yoga? The short answer is that yoga makes you feel better. Practicing the postures, breathing exercises and meditation makes you healthier in body, mind, and spirit. ... What's more, yoga: Improves muscle tone, flexibility, strength, and stamina. The truth is that the practice of yoga is not about changing the brain, body, headstands, or even about gaining greater happiness and joy. Yoga aims toward transcendence of all those things.

Below are a couple links that you can try.