Start in “up” part of a push-up with abs tight and body in line from head to heels, hands on sliding discs (A). Bend right elbow and, keeping arm as close to body as possible, lower into a push-up, sliding left arm straight out in front of you (B). Press back up, sliding left arm back to “A.” Repeat with right arm. Continue alternating for 6–10 reps per side.
Try this! This packable tool works well on virtually any surface to create a less stable exercise environment. It forces you to engage your core whatever the exercise. Our top pick: SKLZ Slidez ($24; amazon.com).
