Get into a traditional push up position. When you move toward the floor, bring your right knee to your right elbow, keeping it off the ground. Press back up to starting position and alternate sides.
Basso says: You’re getting a crunch while also doing a pushup. By moving your knee to your elbow, it forces that side — and all of core muscles — to fire even more. Plus, when you deload one side, it adds extra workload to your arms and chest.