The sledgehammer swing is an exercise working the abdominals and numerous other muscles. The sledgehammer is slammed from overhead onto a tire which absorbs the impact and causes the hammer to bounce back up. It can be performed for time or reps as part of a functional fitness or athleticism-focused workout.
You will need a tire and a sledgehammer for this exercise. Stand in front of the tire about two feet away from it with a staggered stance. Grip the sledgehammer.
If you are right handed, your left hand should be at the bottom of the handle, and your right hand should be choking up closer to the head.
As you bring the sledge up, your right hand slides toward the head; as you swing down, your right hand will slide down to join your left hand. Slam it down as hard as you can against the tire. Control the bounce of the hammer off of the tire.