ACL is crucial for knee stability and movement. injuries can occur during sport activities, especially with quick direction changes, quick halts, or jumps, like soccer, basketball, and tennis. less severe injuries may not lead to much a noticeable sound or swelling, but severe injuries can cause a loud popping sound and significant swelling. Women are more prone than men, due to factors like anatomy, muscle strength, and playing style. Physical therapy and reconstruction surgery are widely used treatments for ACL injuries, to restore knee function and strength.