Start on your hands and knees. Place your ankles on top of a physioball (don’t use your toes to grip it) with your arms extended in the push-up position. Do push-ups. Once you get the hang of that, place each hand on a medicine ball, as shown.
Muscles worked: Abs, erector spinae, pecs, triceps.
Sets/Reps: 3 sets to failure.
Applications: Great for adding upper-body control and bilateral strength.
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