The A300 Seated Calf is mainly designed for World record-holders Willie Banks (triple jump) and Mike Powell (long jump). It features unilateral movement to help you to develop balanced explosive lower leg power and its Bilateral movement is to train muscle symmetry and gives you a full range of motion. The machine automatically preloads and adjusts leg length. Unlike conventional machines that use iron, the A300 Seated Calf’s low inertia design gives you a smooth resistance. The result is a workout unlike anything else on the market. This machine comes with a compact footprint, a large digital display that shows resistance, sets, repetitions, and peak power; Thumb buttons at a suitable position that lets you change resistance without changing position, a chip system, and integrated technology. With this machine, you can enjoy a pain-free range of motion, achieve your goals very faster, train at any speed as you wish, and have a unique versatility