Knee Replacement Recovery: What to Expect, Week by Week

This guide covers what recovery from a total knee replacement actually looks like, week by week — what happens in hospital, what the first fortnight is like at home, when you can expect to drive, and what the first year holds.

It takes about eight minutes to read. If you are still deciding whether to have surgery at all, Understanding Knee Arthritis is the better starting point, and the total knee replacement page explains the operation itself.

The short version

In hospital: days 0 to 4

Most people stay two to four nights.

You will likely be surprised how early you are asked to stand. Weight bearing usually begins within about six hours of surgery, and there is a good reason for the hurry: moving early improves circulation, reduces the risk of blood clots, and makes the knee less stiff than it would otherwise become.

The spinal anaesthetic means your legs may feel numb for the first few hours. As it wears off the nerve block continues to take the edge off the pain, and you move onto tablets from there.

What happens over those days:

• Physiotherapy daily, starting the morning after surgery. Gentle at first — ankle pumps, straightening the knee, short walks
• An X-ray on the ward, to confirm the implant is properly positioned
• The dressing reduced to the one Dr Clark applied in theatre, which normally stays on for two weeks
• Back into normal clothes, sitting out in a chair for meals, getting back into an ordinary daily rhythm

You go home once four things are true: your pain is controlled with tablets, the dressing is dry with no complications, a physiotherapist has assessed you as safe to move about independently, and your bladder and bowels are working normally.

If you need more support before going home, a transfer to a rehabilitation ward can be arranged. That is a normal path, not a setback.

Weeks 1 to 2: the first fortnight at home

This is the hardest stretch for most people, and it helps to know that in advance.

You will be using crutches or a stick. The knee will be swollen, stiff and sore, and it will be worse in the evenings. Sleep is often broken in the first week or two — finding a comfortable position takes some experimenting, and many people find a pillow under the calf, rather than directly under the knee, works better.

Take the pain relief. This is the single most common thing people get wrong. Patients often try to be stoic and cut down too early, then find they cannot do their exercises because it hurts too much, and the knee stiffens. Pain relief in this phase is not indulgence — it is what makes the physiotherapy possible.

Pace yourself. Little and often beats one big effort. Short walks several times a day, with rest and elevation in between, will get you further than a single long push that leaves the knee swollen for two days.

Elevate and ice. Leg up above hip height where you can, ice regularly. Both genuinely reduce swelling, and less swelling means more movement.

Make the house safe. Loose rugs, trailing cords and cluttered hallways are the main trip hazards. Sort them out before you come home rather than after.

Dr Clark will see you at around two weeks to check the wound, review how your pain is being managed, and make sure you have enough medication. Your physiotherapy is usually stepped up around this point.

Weeks 2 to 6: building range and strength

The shift in this phase is from protecting the knee to working it.

Exercises become more demanding — standing knee bends, mini squats, step work, progressive resistance. Most people are off crutches and onto a single stick during these weeks, and then off the stick entirely somewhere between four and six weeks, depending on stability and confidence.

Two things matter more than anything else here:

Getting the knee fully straight. A knee that does not fully extend changes how you walk and is much harder to correct later than it is to achieve now. Your physiotherapist will be firm about this, and they are right to be.

Bending consistently. Range of movement is easiest to gain in the first three months. It does not close off after that, but it gets harder — which is the argument for doing the exercises on the days you do not feel like it.

Expect setbacks. A day where the knee is more swollen and sore after you did more than usual is normal and does not undo your progress. It is information about pacing, not damage.

When can I drive again?

Around six weeks is typical, but the calendar is not the test. You need to be off opioid pain medication, able to sit comfortably and work the pedals without pain, and able to perform an emergency stop without hesitation.

Right knee surgery, and driving a manual, generally take longer. Do a test drive somewhere quiet before you rejoin traffic, check your insurer’s position, and confirm with Dr Clark at your review before you get behind the wheel.

Weeks 6 to 12: back to ordinary life

By this stage most people are walking without an aid, managing stairs, and getting back to work if the job is not physically demanding. Desk-based work often resumes earlier; manual work takes longer and should be discussed specifically.

Swelling is still common after activity and will be for months yet. The knee may feel warm, may click, and will probably still be numb in a patch to the outer side of the scar — that numbness is from small skin nerves divided during surgery, it is expected, and it usually shrinks over time though a small area may remain permanently.

Low-impact activity is the right target: walking, swimming, cycling, stationary bike. These build strength without loading the joint the way running and jumping do.

Three months to a year

Progress slows down but does not stop. Most of the improvement in pain and function is evident by six months, and the knee continues to feel more natural, stronger and more reliable through to about twelve months.

Things that are still normal at this stage: occasional swelling after a big day, some stiffness after sitting a long time, clicking, and a patch of numbness near the scar.

For the long term, three things protect the replacement: keeping your weight in a sensible range, staying active with low-impact exercise, and avoiding repetitive high-impact loading. Whether running specifically is reasonable depends on the individual — that question has its own page.

The five things that slow recovery down

These come up again and again.

1. Doing too much, too soon. Early progress is encouraging, and people push. The knee responds with swelling, heat and pain that then limits movement for days. Increase gradually and treat a flare-up as feedback about pacing.

2. Under-dosing pain relief. Covered above, and worth repeating because it is the most common and the most costly. Follow the regimen you were given for the early weeks.

3. Skipping physiotherapy. Missed sessions and neglected home exercises cause stiffness and lost range that is genuinely hard to recover later. Consistency beats intensity.

4. Ignoring swelling. Swelling is not just uncomfortable — it physically limits how far the knee will bend. Ice, elevation and compression are not optional extras.

5. Not phoning when something worries you. People hesitate because they think they will be wasting someone’s time, or that they have done something wrong. Most concerns turn out to be a normal part of healing, and finding that out costs one phone call. The ones that are not normal need to be seen early.

Eating and sleeping well

Neither is glamorous, and both genuinely affect how you heal.

• Protein at every meal — meat, fish, eggs, dairy, legumes. Tissue repair needs it, and appetite often drops after surgery just when the requirement goes up
• Calcium and vitamin D for bone healing
• Fluids, consistently. Dehydration is common in the first week and does you no favours
• Sleep where you can, including naps. Broken nights are normal early and improve as pain settles

The part nobody warns you about

Recovery is not only physical, and it is common to feel flat somewhere in the first few weeks. You have had major surgery, you are more dependent on other people than usual, sleep is broken, and the daily improvements that felt dramatic in week one become less obvious in week four.

This is ordinary and it passes. What helps: having people around, getting outside once a day even briefly, and keeping some perspective on the timeline — six weeks feels enormous when you are in it and unremarkable a year later.

If low mood persists rather than lifting, mention it. It is a normal thing to raise with your GP or with the rooms.

Getting the most out of your recovery

The operation sets up the result. What you do over the following three months determines a good deal of how it feels.

The patients who do best are rarely the ones who pushed hardest. They are the ones who took their pain relief properly, did their exercises on the ordinary days as well as the motivated ones, respected the setbacks without being derailed by them, and phoned when something did not seem right.

If you have questions about your own recovery, or you are weighing up whether knee replacement is the right step, book a consultation or phone the rooms on (08) 6332 6365.

This guide is general information and does not replace the specific advice given to you by your surgeon and physiotherapist. Where their instructions differ from anything here, follow theirs — it is based on your knee.