This machine allows you to experience low load high speed single limb jumping with tremendous control and stability to significantly reduce the risk of trauma to the body. This machine provides a way to get maximum stimulation to the foot and ankle while sending forces directly to the POWER CENTER. Many people are too weak in their POWER CENTER or in their foot and ankle to perform jumping exercises correctly and without risking over traumatizing the body. The Plyometric Jumper uses ELASTIC RESISTANCE (not weights). Elastic resistance allows for more rapid improvements with higher loads and less trauma to the body. You get the best of both worlds. Improved function without the trauma to the body.