TW - ACL Rehabilitation TW - ACL Rehabilitation (205 KB)

These notes have been prepared to help guide you through your recovery following your anterior cruciate ligament reconstruction. At each post-operative appointment your progress will be reviewed and further suggestions made regarding your exercise program.

The most important aspects of your recovery are to achieve and maintain full extension (straightening) of your knee and to regain good function of your quadriceps muscle at the front of your thigh. Your progress should essentially be guided by pain and swelling. These should continue to gradually decrease, although short term increases of less than 48 hours duration are not uncommon and simply indicate that you have done a little too much too soon.

The use of the Tubigrip compression sleeve and regular icing should continue for as long as swelling is present (usually six to eight weeks). Even after the swelling has resolved, it is worth icing the knee after each exercise session for at least four months.

For simplicity, the rehabilitation program has been divided into phases. These are not meant to be strict and your progress may be faster or slower depending on the response of your knee.

0 - 2 weeks

Key goals

Lock your knee out straight

This is extremely important. You should lock your knee as often as possible by resting with a rolled towel under your heel or with your heel on the padded arm of a couch (e.g. 30 to 60 minutes, four times per day).

If you are not able to lock your knee out straight after three weeks you greatly increase the chances of needing an arthroscopy at a later date to restore full extension.

Reduce the swelling (R.I.C.E.)

Control your pain

Take regular analgesia, which you can reduce as your pain subsides. Ice also reduces your pain. An increase in pain in the shin and calf at about four or five days following surgery is quite common and is usually associated with the appearance of bruising which can be quite dramatic. Ice, compression and elevation will all help to reduce your symptoms.

Try to walk normally

Take as much weight as is comfortable, but use the crutches for as long as you feel you need them. This varies from one person to another and may be as little as a few days or as long as a few weeks. To walk normally, try to heel strike and lock your knee when you step. Most people are off their crutches by two weeks. You may find that a good transition is to use just one crutch in the OPPOSITE hand.

Do your exercises

You must do your exercise program at least four times a day. Your progress through these exercises should be gradual and guided by your pain and swelling. Take painkillers 45 minutes prior to exercising if necessary.

Begin exercises (1) and (2) the day after your operation and repeat these exercises four times per day for the first two weeks.

1) Knee locking

With a rolled towel under your heel, tighten the quadriceps muscle at the front of your thigh and push your knee into the bed. Hold for five seconds. Repeat 30 to 40 times.

2) Knee bending

Sit on a chair placed on a slippery floor (e.g. tiles) with socks on. Slide your heel back on the floor, bending the knee as far as comfortable and hold for five seconds. Then slide it forwards and relax. Repeat 20 times. Two weeks after your operation add exercise (3) repeat four times per day.

3) Prone leg hang

This exercise straightens your knee. Lie on your stomach with your lower legs hanging over the end of a bed (knee caps off). Try to relax and hang there for up to two minutes. Try to enhance the stretch by placing your good foot over the back of your affected heel and push down.


The pattern of walking is:

To manage steps with crutches:

It is not uncommon for bruising to appear a few days after surgery. Sometimes this can cause some pain, especially over the shin. Regular icing and taking painkillers will help reduce any discomfort.

Patients usually notice an area of numbness on the outside (lateral side) of the scar. This is due to small nerves in the skin being cut as part of the incision for surgery. The area involved varies a lot but usually decreases with time. While you may always have some numbness, it does not usually cause any problems and tends to be forgotten.

2 to 12 weeks

During this period you should continue with the exercises from the first phase and also gradually add the exercises outlined below. Usually at about this time you have started seeing a physiotherapist, who plays an important role in guiding you through your rehabilitation until you return to sport. You should continue to use regular icing and the compression stocking.

Progress should be guided by pain and swelling. If these are increasing, you are probably overdoing things.

Don’t forget about extension and be sure that you are able to lock your knee out straight. Use prone leg hangs if you are having any difficulty at all with extension.

You can get in a swimming pool provided the surgical wound is clean and well healed but avoid kicking until the eight-week mark. Use a pool buoy if you want to do lap work for fitness.

Quadriceps strengthening

You should start doing wall squats, forward lunges and straight leg raises as described in the pictures below:

Each exercise is repeated at the rate of one every five seconds. You should do 3-5 sets per day, building up to 20 repetitions per set. Exercise each leg separately.

(Wall Squat)

(Straight Leg Raise)

(Forward Lunge)

Hamstring curls

See picture. These are often quite difficult if you have had a hamstring tendon graft. Be patient and build up gradually to 2-3 sets per day, working up to 20 repetitions per set. Exercise each leg separately.

It is very common to experience a sensation of tearing in your hamstring at around three weeks from surgery. This is really just stretching of some of the scar tissue that has been laid down where the hamstring tendon was taken from. There may be quite a sharp tearing sensation at the back of your knee, followed by difficulty extending the knee. There may be some bruising at the back of the thigh and knee. This usually will settle over a few days.

Exercise bike

You can start as soon as you are comfortable. You will need to be able to bend your knee past a right angle and will have to start with the seat raised. Most people are able to ride an exercise bike for short periods by the end of the fourth week.

Gradually build up to 20-25 minutes, 3-4 times per week. Initially there should not be any resistance. Once you can ride for 15 minutes you can alternatively increase the resistance and the time you spend on the bike.

If you feel confident you can start riding a road bike from about eight weeks, but be careful. The risk is in having a fall and re-injuring your knee.

Jogging on mini-tramp

From about eight weeks onwards you can try to jog on a mini-tramp, but not a treadmill. Gradually build up to 10 minutes.


By about five weeks you will probably be able to start a gym program. Ideally you should continue with a program three times a week for three to four months. Get a gym instructor to design a program for you including the following exercises:

Balance work

There are many exercises that you can do to improve your balance. Standing on one leg and doing ⅓ squats is a good way to start. You can make it more challenging by standing on a pillow. You can then progress to using something like a wobble board or DuraDisc.

Once you have mastered shallow squats you can start with “arabesque” exercises. If standing on your left leg, you should start with your right aim straight and pointing upwards and forwards and your right leg straight and point backwards. Then tilt forwards, keeping your trunk straight. Lean forwards until your right arm and leg are parallel with the floor and then straighten up again.

(Arabesque Exercises)

12 to 16 weeks

During this phase you should continue with your gym program and remember to control swelling and maintain the ability to extend your knee.

When you can jog comfortably on the mini-tramp for 10 minutes you can start jogging outside. Start on grass and begin with walking / jogging. Gradually build up until you can do the equivalent of four laps of an oval. At this point you can start some run-throughs and build up to sprints.

You can also start doing some hopping and landing drills. These should initially be done with both legs together (i.e. jumping) and as you gain confidence you can do the same exercises for each leg separately (i.e. hopping). The exercises should be done with the weight on the balls of your feet and your knees slightly bent. Start with small hops and gradually increase the distance. Initially start with forwards and backwards movements and then progress to side-to-side and diagonal movements. You should build up to 10 repetitions on each leg.

Once you can hop comfortably on a flat surface, you can start hopping down from a small step and then up on to a small step. Gradually increase the height of the step.

(Step Down)


(Russian Curls)

4 to 6 months

Once you are running confidently in a straight line you can start changing direction, gradually increasing the sharpness of the turn and the speed at which you make the turn. You can also recommence sports-specific drills such as kicking a football, hitting tennis balls, and shooting baskets. Progress gradually and use your common sense. You may feel more comfortable wearing a neoprene (wetsuit material) knee support such as a Thermoskin.

A useful program that has been designed to prevent anterior cruciate ligament injuries, but is also a very good preparation for return to sport, can be found at If you can do this program comfortably, you can recommence noncontact training.

6 to 12 months

During this period you gradually increase your training and can resume full training provided that you have full movement, no swelling, and good quadriceps strength. You need to be doing full training for at least a month before you resume competition.

These notes have been prepared by orthopaedic surgeons at OrthoSport Victoria. They are general overviews and information aimed for use by their specific patients and reflects their views, opinions and recommendations. This does not constitute medical advice. The contents are provided for information and education purposes only and not for the purpose of rendering medical advice. Please seek the advice of your specific surgeon or other health care provider with any questions regarding medical conditions and treatment.