What Exactly is the Sky King Calf Isolator?
The Sky King is a device consisting of a support belt, some straps, two heavy duty springs, and two heavy duty foot stirrups. Essentially you wrap the belt around your waist behind you and each foot into a stirrup. Then you pull the straps tight to create the tension in the springs. Once you have strapped yourself in you contract your toes and calves into a planter flexion motion which is resisted by the springs. Pretty simple stuff really.
