Jump 99 Plyometric Training Shoes, (Male 5 / Female 6.5), Male 5 / Female 6.5

In regular shoes, 75% of the body?s weight rests on the heel. Therefore, the calf muscles, exert little effort in supporting the body. In Jump99 shoes, the heel factor is eliminated, causing the calves to support 100% of the body?s weight. This overload works the calves and Achilles tendons with a force equal to 6. times the body?s weight upon impact. Increase Vertical Jump by 5-10 inches Increase Fast Twitch Muscle Fibers for Explosive Power Lower 50M Dash Time by 2/10ths of a Second Increase Reactive Strength & Agility Increase Calf Mass & Definition