5 level adjustable helps to make your muscles more sensitive during exercising; helps you stretch and reduce the chance of injury. with massage points according to the leg ergonomic uniform distribution, can effectively stimulate different acupoints improve leg flexibility, effective prevention of plantar fasciitis. not only helpful for stretching before/after a workout but also beneficial for recovery from achilles tendon injuries, shin splints, calf strains, and other foot and ankle injuries and pain the calf stretcher also contributes to the recovery of x-shaped legs, o-legs, plantar fasciitis,â  â achilles tendon injuries, calf strains. unique stretching tool is proven to stretch the lower leg muscles easier and more effectively than conventional methods