1. Isometric exercise: Isometric exercises are those exercises, which are not visible. In fact, there are no direct movements, hence they cannot be observed. In these exercises, work is performed but it is not seen directly.
2. Isotonic exercise: These are those exercises in which movements can be seen directly. Work is done in these exercises. Isotonic exercises tone up the muscles. Muscles become flexible. Length of the muscle can be increased by isotonic exercises are of much values in the field of sports.