Some players may choose to avoid surgery and simply strengthen the leg through rehabilitation exercises (most often hamstring strengthening exercises).
NBA basketball star Sean Elliott, of the San Antonio Spurs, partially tore his ACL when he was 14. He has competed successfully without surgery. People generally can walk and run without an intact ACL, but sudden cutting and twisting is often difficult. For this reason, most high-level football and basketball players who wish to continue competing may be better served having a torn ACL reconstructed. Studies show that more than 50 percent of players with a torn ACL will have recurrent problems with swelling and collapse of the knee. These problems can lead to cartilage damage and eventual arthritis in the involved knee.