Weighted Ring Push-Up

Same push-up, but the rings underneath your hands are free to drift, rotate, and swing, so your shoulders and wrists are constantly making small corrections to keep them steady. Turn the rings in slightly as you lower rather than letting them splay outward. Lower with your elbows at a moderate angle, chest toward the gap between the rings, then press away while keeping them from swinging out. The added weight makes any wobble more pronounced, so slow the tempo down rather than trying to power through the instability.