The choice of professional sports teams, military, schools, physical therapy clinics and anyone who has injured and/ or weakened ankles. The Ankle Exerciser is the industry standard for lower leg & ankle progressive resistance exercise. It is the best ankle rehabilitation system in the industry simply because it works. Therapists prefer to work with known weights, rather than hydraulics for measuring a patient\'s success. The Ankle Exerciser performs load-resisting dorsi-flexion & plantar-flexion exercises. Proven effective in successfully strengthening and rehabilitating thousands of ankles.