Try the ULTIMATE PUSH-UP:
Start off in advanced plank position (basic push-up position), hands placed right under each shoulder, flattened body position and feet hip width apart. Slowly drop your chest nearly to the ground and as you come up, alternate a leg lift for each repetition. Be sure to exhale as you are pushing up from the ground. Not only are you adding more weight to each push up, but your core is working overtime to stabilize the position. Try a few!
—“Big” Mike Arnone, Owner and Certified Personal Trainer