Jumping Rope Exercise Benefits Jumping rope can increase the elasticity and resiliency of lower-leg muscles, leading to a reduced risk of lower-leg injuries. Jumping rope regularly strengthens the calf muscles and improves the elasticity of the surrounding tendons and fascia. Muscles used in Jump Rope: The gastrocnemius fibers contract almost isometrically while the fascial collagenous elements lengthen and shorten like an elastic yo-yo spring (especially the Achilles tendon). Stand in the middl