A common injury in athletes that involves the ligament in the knee is an ACL injury. The anterior cruciate ligament (ACL) is crucial for stabilizing the knee joint, and injuries typically occur due to sudden stops, jumps, or changes in direction. Athletes in sports such as football, basketball, and skiing are particularly susceptible to these injuries. ACL injuries often require extensive rehabilitation, and in some cases, surgical intervention to restore full function. Proper conditioning and technique can help reduce the risk of such injuries in athletes.