In one example, an apparatus includes a baseplate, a footplate connected to the baseplate, a heel support connected to the footplate, an instep securing device connected to the heel support or footplate, a calf attachment member configured to releasably attach to a leg of a user, and a first cord movably connected to the baseplate, the first cord terminating at its first end in a handle, and a second end of the first cord is configured to attach to the calf attachment member.