The Monster Walk uses progressive variable resistance to restrict you from using momentum. As a result, you will strengthen lower body and core muscles at their weakest point, increasing your overall speed and agility and reaction time. The Monster Walk is also a great way to warm up muscles to help reduce the chance of injury. The Monster Walk both strengthens and builds speel and agility in the lower body. Different exercises target and strengthen thighs, glutes, hamstrings, and calves with lunges, extensions, and curls. Increase speed and stride length for explosive moves. Shuffle in all directions for freedom of movement, balance improvement, and robust leg drive. The Monster Walk is an extremely useful and versatile product, make sure and pick yours up today!