 A new type of robotic exoskeleton has been developed which can help humans carry heavier loads while walking at high speeds. This exoskeleton uses mechanical adaptability to mimic the bicycle center of gravity motion, allowing the user to reach and maintain high walking speeds even with a heavy backpack. By optimizing the limb stiffness, the exoskeleton can allow the user to accelerate one extra body weight up to top race walking speeds in just 10 steps. This technology could potentially extend human weight bearing and fast walking ability without requiring any external energy input. This article was authored by Tenga Zhang and David J. Braun.