The rehabilitation after ACL reconstruction is long, grueling, and often harder than the actual surgery itself. Clearance for sports participation can be expected about 6-9 months after surgery. Improvement in knee function continues for up to a year after surgery with increased sports participation..The studies show return to sport occurs in about 82-95% of patients. Return to preinjury level of participation is reported at about 63%. Fear of re-injury is the most common reason cited for a reduction in or cessation of sports participation.