Cable Tricep Kickback

Attach a single handle to a low pulley, hinge forward from your hips, and raise your upper arm until it is parallel to the floor, elbow bent and tucked close to your ribs. Keeping your upper arm pinned in that position, straighten your elbow to extend your forearm back, squeezing your tricep hard at full extension. Only your forearm should move, if your upper arm drifts or your torso rocks to help finish the rep, the weight is too heavy. Bend your elbow back under control rather than letting the cable snap it forward, and keep your torso hinge steady throughout the set.