How to do it: Start in a push up position with your thighs on the Swiss ball. Bend your left leg at a 90-degree angle, then extend it up like you’re pressing your heel to the sky. Rotate your torso to the left, pulling your right knee up toward your left shoulder. Return to neutral, repeat on the other side, keeping your torso parallel to the ground throughout the exercise.
Reps: 6 on each side
What it works: Shoulders, chest, back, core, inner and outer thighs, hip rotators.