Many say that yoga has gained such wide-spread popularity in America in main part because it is viewed as another way to keep our bodies fit. This is a perfectly fine reason to do yoga. The practice of yoga does an amazing job of strengthening the entire body. The arms get strong in balancing poses - the stomach gets strong in headstand, plank pose and vastisana - the legs and hips gain strength when we enter in to warrior poses - and most everyone who has done a sun salutation has felt their heart-rate rise. In this way yoga IS the perfect workout.