Doing these plank leg lifts on an exercise ball further challenges your balance to help strengthen your core while you work your backside.
- Place your belly on an exercise ball, and walk your hands out so the ball is underneath your shins. Your hands should be underneath your shoulders.
- Draw your navel toward your spine to engage your abs, which will help keep your spine straight and your body stabilized.
- Lift your left leg into the air, then slowly lower it onto the ball. Keeping your pelvis level, switch sides and lift the right leg. This counts as one repetition.
- Do 10 reps.