At the moment, orthotics is one of the main methods of discipline work called rehabilitation. Along with quality surgical repair, orthotics and physiotherapy early important elements of a postoperative positive developments. The paper has the general objective biomechanical modeling of the musculoskeletal system, with applications in medical and sports recovery, and in particular, the objective is modeling the ankle joint, development of a model and analyze a mechanism for recovering the Achilles tendon trauma.