Tone up your arms, chest, and core with this sliding version of a triceps pushup.
Begin at the top of a modified pushup position with your hands on the plates, shoulder-width apart. Bend your left elbow and lower into a pushup (keeping your arm close to your body) as you slide your right arm straight out on the floor. Press back up, sliding your right arm in. That's one rep. Do 15 reps total, alternating arms each time.
Tip: Think of pressing your shoulders down as you slide your arm back in at the top of your pushup. This will help engage your back muscles too.