a training method and device for the lower body providing a mode of exercise that manifests as a functional , closed - kinetic - chain training of the gluteus maximus and the hamstrings in a natural sequential firing pattern . the device construction allows an upright stance so that during exercise the lower body mimics a stride action , as in walking . by combining this natural stride action with adjustable resistance elements in the device , a wide range of uses , from strength training to rehabilitation , are achieved . the device generally includes footplates that are movable in forward and backward directions and also can be simultaneously moved upward against resistance . the heel of the foot can simultaneously be raised with respect to the toe of the foot , also against resistance .