With the MostFit™ Core Hammer you no longer need a bulky tire and sledgehammer to for this style of workout. Try these Core Hammer slams with Jumping Jack. This exercise is great for building core strength, aerobic endurance, and grip strength. With the MostFit™ Core Hammer you or your clients can perform this and a variety of other sledgehammer exercises anywhere, anytime.
Stand with your feet in a semi wide, parallel, base. Be sure to engage your core and protect your grip on the Core Hammer as you slam it on the ground in front of you. As you retract the Core Hammer extend it over head and jump your feet together like you would during standard jumping jack. Jump your feet apart back into your starting position and repeat.
Consult a physician before performing this or any exercise program. You as the user are responsible independently for use of any fitness programs or equipment and assume the risks of any resulting injury.