ACL is key for knee stability and movement. Injuries often occur during athletic play, especially with rapid changes of direction, sudden stops, or leaps, like soccer, basketball, and tennis. less severe injuries may not produce much sound or swelling, but serious injuries can cause a loud popping sound and major swelling. Women are more prone than men, because of factors including anatomy, muscle strength, and playing style. physical therapy and reconstructive surgery are widely used treatments for ACL injuries, aiming to restore function and strength.