What is one potential outcome of ACL injuries if not treated?

Chronic instability of the knee is a common outcome when an ACL injury is left untreated. The anterior cruciate ligament (ACL) is crucial for stabilizing the knee joint, particularly during activities that involve pivoting, jumping, or sudden changes in direction. Without appropriate treatment, which may include rehabilitation or surgical intervention, the knee can become progressively unstable. This instability can lead to a range of problems, including difficulty in performing everyday activities, excessive wear on the cartilage, and the potential development of osteoarthritis over time.

Recovery after an ACL injury without treatment is unlikely to be complete, as the ligament does not heal on its own in a way that restores full function. The other options, such as full recovery, improved muscle strength, and increased flexibility, do not align with the expected consequences of an untreated ACL injury. Rather, the lack of stability from an unaddressed injury often results in compensatory movements that can lead to further joint issues and decreased overall function in the knee.