The anterior cruciate ligament (ACL) injury is a common knee injury, especially among athletes. The ACL is one of the two cruciate ligaments that provide stability to the knee as a joint. It can be injured in several ways, but the most common is through a twisting motion when the foot is planted on the ground. This can cause the ACL to tear or rupture, resulting in pain and instability in the knee joint. The ACL is It is the most commonly injured ligament of the knee, often seen in athletes such as soccer, football, and basketball players.