With the MostFit Core Hammer you no longer need a bulky tire and sledgehammer for this style of workout. The Core Hammer can be used in group exercise classes, small group training, and personal training. In this video personal trainer Erin demonstrates one of the great sledgehammer exercises that can be done with MostFit Core Hammer. Start in a semi-wide stance with knees bent slightly, and slam the Core Hammer 5-10 times. Place the Core hammer on the ground and continue to perform 10-20 explosive speed skaters from side to side. During each repetition touch the Core hammer head with your opposite hand. This combo can be used in a Tabata drill, HIIT workout, or for a circuit training session.