The ACL Surgery Recovery Timeline with PT

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The anterior cruciate ligament (ACL) is a commonly injured ligament that often needs reconstructive surgery to help individuals recover. It may be possible to limit ACL injuries through training, but when they occur, proper treatment is essential. Every individual ACL injury, surgery, and rehabilitation is unique and dependent upon the specific circumstance. Utilizing proper rehabilitation and encompassing post-operative care, we can assist patients in getting back on the field as soon as possible. Here’s what to expect, in general, noting that each person’s needs are different for an ACL recovery timeline. 

Pre-Surgery Rehab

0 weeks

Prior to your surgery, it may be beneficial for you to come in for pre-rehabilitation physical therapy, sometimes called prehab. During this process, we’ll work to help ensure your body is ready for the procedure. Often it involves spending some time working on getting swelling to subside, normalizing range of motion and your walking pattern, and strengthening the muscles around the knee. This does not fix the tear in the ACL, but it does minimize strength loss and sets the stage for a successful recovery after surgery.


Begin ACL Physical Therapy

Weeks 1 to 3

Physical Therapy after surgery focuses on: protecting the graft and allowing it to heal, eliminating swelling, regaining range of motion, and initiating exercises to improve muscular activation and strength around the knee joint.


Swelling control after surgery is very important. Your well-trained physical therapist will be able to provide instruction on ways to eliminate or minimize swelling. Some of these include: how to properly utilize ice, apply compression, and use elevation to assist.


Stiffness or tightness in the knee after surgery is normal, but your physical therapist will work with you to regain mobility as soon as possible. Normalizing range of motion in the knee minimizes the possibility of scar formation and allows for the mobility necessary to progress back to normal activity.


It’s quite important to regain proper control over the leg muscles, specifically the quadriceps, which may be inhibited after surgery by pain and swelling. The ability to contract the quadriceps well ensures that once you start walking you will have a normal pattern and proper balance.


These first few weeks, which could extend to four or more depending on your improvement, are all about baby steps. We want to eliminate some of the most common causes of problems after surgery, such as stiffness or a loss of range of motion of the joint in the knee. We also want to focus on keeping those muscles strong.


Strengthening Phase

Weeks 4 to 10

This is the stage when you will start to see a significant amount of improvement. Although the repair is still healing, it is important to progress activity gradually and under the supervision of your physical therapist. Your physical therapist will ensure you are walking normally with proper alignment. Normalizing your walking pattern early in the recovery process is important. You may need to use an assistive device, such as crutches, or a brace to help you walk without compensations.


During this time, you’ll continue to have manual therapy as well as an exercise-based treatment program. The ACL graft tissue is continuing to heal and goes through a remodeling process, where it becomes more similar to ligamentous tissue that can handle more of the force that is required of the ACL.


Initially, you may need an assistive device or a brace to help you with walking, but during this time period you should transition to walking without assistance. Inflammation should be low, so you should start to see your mobility improve substantially at this level.


Transition to higher level activity

Weeks 12 to 16

Between the walking and running process, you will need to give your body a lot of time to improve. Some people might be ready to work on drills toward returning to run. Every individual’s progress is different, and your therapist will provide more insight into where you should be during this process.


Most often, swelling in your knee should have subsided. You should have full range of motion with the knee, including the ability to fully straighten and bend it. If stiffness is present, your therapist will work through manual therapy to help overcome these limitations.


Your physical therapy during this stage is going to be to build up your core strength and strength of all the muscles of the lower body, especially the quadriceps. Some endurance training may get underway in a controlled environment, such as on a stationary bike. Healing is still occurring, so you are not likely to be hitting the trail just yet. Criteria for running under the supervision of a physical therapist include: absence of swelling, full ROM, and quadriceps strength that is 70% of normal.


Full Recovery

Weeks 16 – nine months

In the weeks following, you should see a gradual sense of getting back to normal or better. It can take an ACL injury a significant amount of time to heal, but at this point, you should be noticing less overall frustration and more performance. It’s a good idea to start getting active, as long as your therapist approves it. A PT will guide you through gradual progression of return to sport activities, though some drills may become more challenging for you until your body re-learns how to do them. 


Based upon research, the average time frame to return to full sports activity is usually nine months, so be patient with your body.


It will take some time for you to get back to 100 percent performance. Yet, if you continue working with your physical therapist, you will notice this process is working very well to get you back out there and playing at your best again. It takes time, but the work you put in now in physical therapy will pay off. Don’t push the ACL recovery timeline too much to get to that point.


Rock Valley Physical Therapy

Rock Valley Physical Therapy is dedicated to getting you back to doing the things you love. We go the extra mile to ensure that patients receive the very best level of recovery possible. If you need physical therapy for any sports injury, including ACL rehab, contact us directly to learn more about what we do.

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More Tips, Insights & Recovery Advice

Man standing in front of Rock Valley Physical Therapy sign in a blue-walled office lobby.
By Kylie Williams June 10, 2026
“Max has been the best physical therapist I have had,’’ she said. “He sincerely listened to what I had to say and was knowledgeable when I asked him questions. He continually asked how the exercises and treatments were feeling. He knew the pain I was in because by surgery time, I could barely walk, sit, or sleep."
By ashley johnson June 4, 2026
We often think of physical therapy as something we only need after a sports injury or a surgery. While PTs are certainly experts in fixing knees and backs, their role in your health goes much deeper. In fact, one of the most important muscles a physical therapist can help you strengthen isn't in your leg or your arm, it’s your heart. Heart disease remains the leading cause of death globally. According to recent data from the American Heart Association, someone in the United States dies of heart disease every 34 seconds. The good news? A lot of cardiovascular disease is preventable through lifestyle changes, with regular movement being one of the most powerful medicines out there. The Challenge of Getting Started Current health guidelines recommend that ad ults get at least 150 minutes of moderate-intensity aerobic activity per week. H owever, for many, that goal feels out of reach. Maybe you want to start walking or cycling, but an old nagging injury flares up every time you try. Or it could be the fear of "doing too much" after a health scare that keeps you on the couch. This is where physical therapy becomes your heart's best friend! How a Physical Therapist Supports Your Heart A physical therapist is a movement specialist. They don't just look at a painful joint, they look at how your whole body moves and how your heart and lungs respond to that movement. Here is how they help you go from staying still to getting active: Before Activity: Before you start a new exercise routine, a PT can assess your balance, strength, and cardiovascular response. This makes sure you start at a level that is challenging enough to strengthen your heart but safe enough to avoid burnout or injury. Overcoming Pain: Many people stop exercising because of joint pain. A PT identifies the root cause of that pain, whether it’s a weakness in the hip causing knee pain or poor posture affecting your breathing, and provides a plan to fix it so you can keep your heart rate up without the aches. Recovery and Beyond: If you have experienced a major health event like a heart attack, stroke, or are undergoing cancer treatment, exercise is vital but can be intimidating. Research highlights that supervised exercise programs led by PTs significantly reduce fatigue and improve quality of life for people recovering from complex medical conditions. Managing Chronic Conditions: Physical therapy is increasingly used to help manage conditions that affect the heart indirectly, such as Type 2 diabetes and high blood pressure, by creating sustainable, low-impact movement plans. Movement is Medicine You don’t need to be a marathon runner to improve your heart health. Brisk walking, swimming, or even gardening can make a massive difference. The key is consistency and safety. If you’ve been hesitant to get moving, or if pain is standing in your way, consider a physical therapy evaluation. Your PT can help give your heart the support it needs to keep you moving for years to come.