ACL is key for knee stability and movement. Injuries often occur during sport activities, especially with rapid changes of direction, quick halts, or jumping, such as soccer, basketball, and tennis. minor injuries may not produce much swelling or sound, but major injuries can bring a loud pop sound and major swelling. Women are more prone than males, linked to anatomy, muscle strength, and playing style. physical therapy and reconstructive surgery are typical treatments for ACL injuries, with the goal of restoring knee function and strength.