Yoga exercise is an ancient indian therapy to healthy living. it is a vast branch containing yoga postures, pranayama (controlling the breath). hatha yoga (power yoga) & a lot more.
regular & gradual yoga practice with right guidance, heals & controls your body, mind & soul. it is also done for attaining higher spiritual goals.........
so check out it for the details http://yogaexercise.blogspot.com/2010/10/yoga-exercises-as-yoga-beginner-it-is.html