Yoga means, union. its a union of a self consciousness & universal consciousness.
it contains three main branches: yoga poses,pranayama (rhythemic breathing) & meditation.
by following all disciplines of yoga with proper guidance of qualified teacher one can get healthy & long life,flexible &strong body, calmness & peace of mind & eternel bliss.
so practice yoga daily & get full benefit of your life.....
http://yogaexercise.blogspot.com/2010/