Abdomen
1. Lie on your back with your legs straight. You can place your hands under your lower back for support. Press your lower back into the floor. 2. Lift both of your heels a few inches off the ground. Keeping your legs mostly straight, begin making small, quick up-and-down kicking motions in an alternating fashion. 3. Keep your core braced throughout the movement to ensure your lower back does not arch.
