A return to full activity after undergoing surgery to repair a torn Achilles tendon takes between six and 12 months, according to the University of California, San Francisco. However, most patients start walking comfortably within four to six weeks and return to exercising in three months, notes About.com.
The injured leg is immobilized with a walking boot, cast, brace or splint for the first six to eight weeks after surgery, explains UCSF. Casts must be changed every two to three weeks to help stretch the Achilles tendon, states MedlinePlus. After removal of the cast, the patient enters the physical therapy phase and begins exercises to enhance calf muscle strength and Achilles tendon flexibility.