Want a flat stomach? This exercise will target your upper abdominals.
Start in a push-up position with your legs up on the stability ball. Make sure that your back is straight and your core is engaged.
Lift your hips upwards by contracting your upper abs. While keeping your knees slightly bent, raise your body up to a V, pause, then slowly lower your body back to the starting position.
Aim for 3 sets of 15 reps.
NEXT: Have you tried the 90-degree crunch?
Workout from Nichelle Laus; Photo credit: Dave Laus