No, this is a different sort of spring-loaded mechanism that allows you to put energy into it when you retract a leg, then unleash that stored energy when your

No, this is a different sort of spring-loaded mechanism that allows you to put energy into it when you retract a leg, then unleash that stored energy when your foot next hits the ground. "However, the current top speed of augmented running, 11 m/s, achieved using a spring prosthesis in series with the legs (13), is 10% below the top speed of natural running. A spring in series with the legs can mitigate collisional energy losses but requires the legs to provide a large force to support the body, unlike the wheel of a bicycle (10, 13, 14)."