Start in a plank position with your legs parallel and your feet together on the seat of the chair. Make sure your hands are directly under your shoulders, and your abdominals are engaged.
Inhale to lower your chest to the floor, keeping the abdominals engaged.
Exhale to press back up to plank. This completes the rep.
Perform 10 push-ups. If it's too difficult in this position, flip your body and rest your hands on the seat of the chair and place your feet on the floor.