Knee stability is important for many sports, and reduced stability is toughly connected with the risk of injury. The most common knee complaints typically involve the patellofemoral joint. Internal instability of the knee refers to the damage of a variety of structures within the knee, including meniscal cartilage tears and loose bodies. Higher knee joint laxity may be an indication of an increased risk of anterior cruciate ligament (ACL) injuries. The patient will present with soreness and instability of the knee during an activity. The knee examination should comprise an assessment of the posture and also the lower extremity alignment. The alignment at the knees can be checked when the patient stand with the feet together and by assessing
