STRETCHES AND STRENGTHENS: The stretching device holds the foot in a proper position to stretch and strengthen muscles, ligaments, and tendons of the foot and lower leg. RELIEVES PAIN: The relief rocker is ideal for Plantar Fasciitis, Achilles Tendonitis, tight calf muscles, ball of foot pain, and shin splints. PROVIDES A DEEP STRETCH: The rocker provides foot stretches for Plantar Fasciitis and other foot pain, along with shin splint, calf, and other lower leg pain. INCREASES FLEXIBILITY: Helping prevent and treat injuries, the rocker increases flexibility and strength in the foot and lower leg. NON-SKID ROCKER BOTTOM: The non-skid rocker holds the foot in a stable position while stretching. It is recommended for use with sturdy athletic shoes.