How Long After ACL Reconstruction Can Rehab Begin? - Rehabilitation

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How long after anterior cruciate ligament reconstruction surgery is the rehabilitation period?


I suffered a torn anterior cruciate ligament (ACL) due to a motorcycle accident and have already undergone reconstructive surgery.
I would like to ask the doctor: After surgery, how long does it typically take for the quadriceps and other muscles to stabilize, at which point further rehabilitation would not lead to muscle growth?

Songhua, 30~39 year old female. Ask Date: 2002/11/06

Dr. Pan Yingda reply Rehabilitation


In fact, the issue you mentioned does not exist.
The current understanding is that rehabilitation should begin immediately after surgery to prevent problems such as joint stiffness and muscle atrophy from worsening.
Delaying rehabilitation will require a longer recovery time.
Generally speaking, one should be able to return to daily activities within three months; otherwise, the progress is considered slow.
Additionally, restoring the quadriceps to be equal on both sides can sometimes be challenging, unless you have the determination and perseverance to continue strength training.
Typically, when experiencing pain in the affected leg, individuals tend to avoid putting weight on it, which can lead to muscle atrophy on that side.

Reply Date: 2002/11/06

More Info


After undergoing anterior cruciate ligament (ACL) reconstruction surgery, the timeline for starting rehabilitation can vary based on individual circumstances, the specific surgical technique used, and the surgeon's protocol. Generally, rehabilitation can begin almost immediately after surgery, often within the first few days. The initial phase focuses on reducing swelling, regaining range of motion, and preventing muscle atrophy.

In the first week post-surgery, patients are usually encouraged to perform gentle range-of-motion exercises while keeping the knee protected. This is crucial because early movement can help prevent stiffness and promote healing. Most surgeons recommend starting physical therapy within a week or two after surgery. The rehabilitation program typically progresses through several phases, each with specific goals and exercises.

Regarding your concern about muscle "settling" or "stabilizing," it is important to understand that muscle atrophy can begin as soon as you are immobilized after surgery. The quadriceps muscle, in particular, is prone to atrophy due to disuse. Therefore, it is essential to engage in rehabilitation exercises as soon as it is safe to do so. The concept of muscle "settling" is somewhat misleading; muscles can continue to grow and strengthen as long as they are actively engaged in rehabilitation exercises.

Typically, by three months post-surgery, many patients can return to their daily activities and may begin to engage in more strenuous rehabilitation exercises, including strength training for the quadriceps and hamstrings. However, full recovery and return to sports or high-impact activities can take anywhere from six months to a year, depending on the individual's healing process and adherence to rehabilitation protocols.

It's also worth noting that the timeline for recovery can be influenced by factors such as age, overall health, and the presence of any complications during or after surgery. Regular follow-ups with your orthopedic surgeon and physical therapist are crucial to monitor your progress and adjust your rehabilitation plan as needed.

In summary, rehabilitation after ACL reconstruction typically begins within a week or two post-surgery, focusing on regaining range of motion and preventing muscle atrophy. The quadriceps and other muscles can continue to strengthen throughout the rehabilitation process, and with consistent effort, you can expect to see significant improvements in muscle function and overall knee stability. Always consult with your healthcare provider for personalized advice and to ensure that your rehabilitation plan is tailored to your specific needs and recovery goals.

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