Isokinetic Plantar Flexion Torque Increases after Open Gastrocnemius Recession

The amount of force developed by a muscle is related to many factors including where the muscle operates on its length-tension curve. It is well documented that placing the triceps surae muscle group in a lengthened state (i.e.: near maximal dorsiflexion) elicits maximum plantar flexion torque [1, 2]. Isolated gastrocnemius contracture (IGC) is characterized by limited dorsiflexion with the knee extended [3], and thus patients with IGC may exhibit plantar flexion strength deficits as a consequence of their reduced range. The ability to generate sufficient torque at the ankle and at the appropriate time is important for normal gait.