Sledgehammers workouts provide a circular/transverse movement not really possible with traditional equipment. Sledgehammer strikes well helps maintain joint flexibility and improves range of motion as well as hand-eye coordination. While swinging a sledgehammer your core is engaged as well as your grip, two main areas that tend to be overlooked.
10 Alt KB Swings (L2 70/53, L1 53/35)
10 Sledge Hammer Strikes Right
10 Sledge Hammer Strikes Left