Develop your range of body motions with resistance and assistance training‎.‎It increases your speed and develop muscle strength for quick direction changes with the flexi‎-cord that stretches as you move to increase resistance using your body weight‎.‎You can switch between resistance and assistance training to improve all your sport movements‎.‎ Helps build and improve muscle strength for explosive initial starts‎,‎ such as football‎,‎ martial arts‎,‎ leaping‎,‎ sprinting‎,‎ shuffling and any sport that requires quick changes of direction‎.‎