The Cheetah® Xcel is a next-generation sports prosthesis that was specifically designed for explosive, short distance sprints of 100–200m, with proprietary design features intended to reduce the user’s running effort and facilitate increased speed from starting block to finish line. It is an estimated one-third as powerful as a native ankle, returning approximately 90% of its energy when the athlete is running. The Cheetah’s curve compresses at impact, storing energy and absorbing high levels of stress that would otherwise be absorbed by the athlete’s knee, hip, and lower back. The carbon blade features a more extreme curve, and the dynamic shape allows for the foot to flex and give a powerful energy kick. A long toe provides better ground contact, while the plantar-flexed pylon handles forward progression.