Begin on lying down on the floor with arms by the side and palms facing down. Inhale and bring the left leg up to a ninety-degree angle with the knee straight. Then exhale lower the left leg to the floor, and repeat with the right leg. Continue this sequence.
If you experience lower back pain during this exercise you can also place both hands with the palms facing down underneath the coxis.
If you really want to built add your abdomen quickly, when lowering the legs go as close as possible to the floor, but don’t touch it.
-It works in the lower abdomen.