Preparing for ACL surgery starts weeks before the actual procedure and covers physical conditioning, medication changes, home setup, and logistics for the recovery period ahead. Most ACL reconstructions are outpatient, meaning you’ll go home the same day, but the recovery stretches six months to a year. The more you do beforehand, the smoother that timeline goes.
Start Prehab as Early as Possible
Prehabilitation, the physical therapy you do before surgery, is one of the most impactful things you can control. The goal is to go into the operating room with your knee as strong and mobile as possible, because the stronger your leg is beforehand, the faster it bounces back afterward. A standard prehab program runs about five weeks and includes progressive resistance training, light plyometrics, and balance exercises.
The benchmarks your physical therapist will aim for: regaining at least 80% of your quadriceps strength compared to your uninjured leg, with 90% being the ideal target for quad strength, hamstring strength, and single-leg hop performance. You should also work to normalize your range of motion, getting your knee to fully straighten and bend as close to normal as you can. Walking into surgery with a stiff, swollen knee makes post-op rehab significantly harder.
At a minimum, prehab should include quadriceps strengthening, range of motion work, and balance and proprioception drills (exercises that retrain your knee’s sense of position and stability). If your surgeon hasn’t brought up prehab, ask for a referral. Even a few weeks of focused work makes a measurable difference in post-operative strength and motion.
Adjust Your Medications
Certain medications and supplements increase bleeding risk and need to be stopped before surgery. The general rule for common over-the-counter anti-inflammatories is to stop them one week before your procedure. This includes ibuprofen (Advil, Motrin), naproxen (Aleve), and celecoxib (Celebrex).
If you take blood thinners like warfarin or clopidogrel, talk to the doctor who prescribed them about exactly when to stop. These medications require an individualized plan because stopping them carries its own risks. Low-dose aspirin falls into a gray area: some surgeons want it stopped a week before, while others allow it to continue depending on your cardiac history.
A detail many people miss is that several common supplements also affect clotting. Fish oil, garlic tablets, ginkgo, ginseng, ginger tablets, chondroitin, and feverfew can all increase bleeding. Stop these at least a week before surgery as well. Bring a full list of everything you take, including supplements, to your pre-op appointment so your surgical team can flag anything that needs to pause.
Complete Your Pre-Op Medical Clearance
Your surgeon’s office will schedule a pre-operative appointment, typically one to two weeks before surgery. Expect blood work to rule out infection and confirm your overall health. You’ll likely have imaging reviewed or updated, including X-rays and the MRI that initially diagnosed your tear. These help your surgeon finalize the surgical plan, assess the alignment of your leg, and check for any additional damage to cartilage or other ligaments.
If you have any chronic conditions like heart disease, diabetes, or lung problems, your surgeon may require medical clearance from your primary care doctor or a specialist. Get those appointments scheduled early so paperwork doesn’t delay your surgery date.
Set Up Your Home for Recovery
You’ll spend the first week or two mostly on a couch or in bed with your leg elevated, so setting up your recovery space beforehand saves you a lot of frustration. Focus on a few key areas.
- Recovery station: Pick a spot where you can recline with your leg elevated above your heart. Stock it with your phone charger, remote, water bottle, medications, and snacks within arm’s reach.
- Ice machine or ice packs: Your surgeon may recommend a cold therapy unit that circulates ice water around your knee continuously. These are worth the investment. If you go with regular ice packs, have several so you can rotate them.
- Bathroom safety: A shower seat for a walk-in shower or a tub seat with a clamp-on grab bar makes bathing possible when you can’t put full weight on your leg. If you have a fiberglass tub, a transfer bench lets you sit and slide in safely.
- Loose clothing: Stock up on shorts or wide-leg sweatpants that fit over a bulky knee brace. Button-up shirts or zip-up hoodies are easier to manage than pullovers when you’re groggy and stiff.
- Crutches or a walker: Your surgical team will likely provide or prescribe these, but confirm ahead of time. Practice using them before surgery day, especially on stairs.
Move tripping hazards like rugs and cords out of your main walking paths. If your bedroom is upstairs, consider sleeping on the main floor for the first week or two.
Line Up a Caregiver
You will need someone with you around the clock for at least the first seven days after surgery. This isn’t optional. During the first 72 hours especially, your caregiver will help with things you won’t be able to manage alone: getting to the bathroom, bathing, preparing meals, managing your ice and elevation routine, and keeping you on schedule with medications. They may also need to handle pet care and basic household tasks.
If you live alone, arrange this well in advance. A friend, family member, or hired caregiver all work, but the person needs to be physically present and available, not just checking in by phone. Make sure your caregiver knows the post-op instructions before surgery day so they’re not learning on the fly.
Plan for Time Off Work
How long you’ll be away from work depends entirely on what your job requires. For desk jobs and remote work, many people return within two to three weeks, though you’ll still need breaks to elevate and ice. Jobs that require standing, walking, or any physical labor take longer. Most people return to daily activities without restrictions around six months. Returning to sports, heavy manual work, or competitive training typically takes a year or more.
File any short-term disability or FMLA paperwork before surgery. Your surgeon’s office handles these forms routinely, but processing takes time, and you don’t want to be chasing paperwork while recovering.
The Night Before and Morning Of
Follow the fasting guidelines your anesthesia team provides. The standard protocol is no solid food for at least six hours before surgery and no clear liquids for at least two hours before. Some surgical centers recommend stopping clear liquids four hours ahead to build in a buffer in case the schedule shifts. Clear liquids include water, black coffee, apple juice, and similar drinks without pulp or dairy. Anything with fat, protein, or particles counts as a solid.
On surgery morning, shower with the antiseptic soap your surgeon’s office provided (if applicable), and skip lotions, deodorant, and jewelry. Wear comfortable, loose-fitting clothes, ideally shorts that fit over a knee brace. Bring your ID, insurance card, and any paperwork your surgeon’s office requested. Leave valuables at home.
You cannot drive yourself home. Arrange your ride in advance and make sure your driver is available for a flexible window, since surgical schedules sometimes shift by an hour or two.
Prepare Mentally for the Long Game
ACL recovery is one of the longer rehabilitation timelines in orthopedic surgery, and the psychological side of it catches many people off guard. Frustration, anxiety about reinjury, and impatience are all normal responses, not signs that something is wrong. Research on athletes recovering from ACL reconstruction consistently shows that most people move through an initial period of difficulty and gradually develop more positive coping strategies as they progress.
Two mental strategies help. First, educate yourself on the rehab timeline before surgery so your expectations are calibrated. Knowing that crutches last seven to ten days, that the first two weeks focus almost entirely on reducing swelling and regaining the ability to straighten your knee, and that full return to sport takes close to a year helps you measure progress against realistic milestones instead of unrealistic hopes.
Second, approach fear of reinjury as something to manage rather than eliminate. When you eventually return to physical activity, the principle of incremental loading works well: start with lower-intensity activity, gradually reintroduce dynamic movements, and build confidence alongside physical capacity. Trying to push past fear all at once tends to backfire, while steady, progressive exposure builds lasting trust in your knee.