An anterior cruciate ligament tear can be very debilitating and painful, leading to loss of knee range of motion, difficulty walking, and joint instability. In this final paper, we will discuss the anatomy and function of the knee, the causes and symptoms of an anterior cruciate ligament tear, and treatment options for the same. Anterior cruciate ligament (ACL) tears are a common knee injury, especially in athletes who play high-intensity sports that involve sudden changes of direction or pivoting movements. ACL reconstruction is a surgical procedure that involves replacing the torn ACL with a new ligament graft. However, there is still an ongoing debate in the medical community regarding the optimal timing and technique for ACL reconstruction, as well as the effectiveness of different rehabilitation protocols. In addition, there is a risk of re-tearing the reconstructed ACL, which may require further surgery and delay recovery. Overall, ACL re-rupture and reconstruction is a complex topic that requires careful consideration and individualized treatment planning. Rehabilitation after ACL reconstruction is a critical aspect of the recovery process and is tailored to each patient's individual needs and goals. There are various rehabilitation programs that aim to optimize graft healing, improve range of motion, strength and stability, and enable a safe return to sports and other activities. These programs usually include a combination of exercises, manual therapy, neuromuscular training and functional exercises. The time and intensity of each phase of the rehabilitation process can vary depending on factors such as the age of the patient, the level of physical activity and the type of graft used in the reconstruction. It is essential to work closely with a physical therapist or athletic trainer experienced in ACL rehabilitation to ensure the best possible outcomes. It is important to note that the rehabilitation process is a specific and often long-term process that requires patience and engagement of the patient in order to achieve optimal results.