Anterior cruciate ligament (ACL) injury is a serious knee injury frequently encountered in sports involving pivot movements such as football, basketball, and skiing. Return to sport after arthroscopic ACL reconstruction is one of the most critical stages of treatment and requires a multidisciplinary approach.

The return to sport process generally begins 6 to 9 months after surgery, but this timeframe may vary depending on individual healing rate, type of sport, and the patient's physical condition. Early return significantly increases the risk of re-injury. Research shows that athletes who return to sport before 9 months post-surgery have a higher re-injury rate.

The rehabilitation program typically consists of four phases: early phase (0-6 weeks) for range of motion and quadriceps activation, middle phase (6-12 weeks) for strengthening, late phase (3-6 months) for sport-specific exercises, and the final phase (6-9+ months) for full return to sport. Meeting specific criteria at each phase is required to progress to the next.

The return to sport decision should be based on functional test results, not solely on time. Criteria such as quadriceps and hamstring strength symmetry, single-leg hop tests, balance assessment, and psychological readiness are evaluated together. The patient is only cleared for full return to sport when all these criteria are met.