Guide
Knee Replacement Recovery Timeline: How Long Does It Take, Week by Week?
Most people walk with a walker or crutches within a day of a total knee replacement, get back to most everyday activities in about 3 to 6 weeks, and return to work after roughly 6 to 12 weeks. Full recovery takes longer: the NHS says it may take several months or more, depending on your age and general health, and a partial knee replacement usually heals faster than a total one. The timeline below is a general guide drawn from the American Academy of Orthopaedic Surgeons (AAOS), the UK's National Health Service (NHS) and published research. Your own surgeon's instructions always come first.
This guide is general information, not a substitute for advice from your own surgical team.
What happens in the first few days after knee replacement?
Rehab starts almost immediately. AAOS says most patients can begin exercising the knee hours after surgery, with a physical therapist teaching exercises to strengthen the leg and restore movement (AAOS OrthoInfo: Total Knee Replacement). Some people go home the same day, while others stay in hospital overnight or a little longer. The NHS says patients usually leave 1 to 4 days after the operation, once there are no signs of complications and they can get around safely on crutches (NHS: Recovering from a knee replacement).
In these early days the focus is on pain control, simple exercises such as ankle pumps, quadriceps tightening and straight leg raises, and preventing blood clots. Blood clot prevention may include support stockings, compression boots, blood thinners and moving your feet and ankles often. If you want to know how the main clot-prevention drugs compare, see our summary of a review of 16 trials comparing aspirin with other blood thinners. Many hospitals also use tranexamic acid during surgery to reduce bleeding, which we covered in a review of 17 trials.
What does recovery look like in weeks 1 to 3?
This is the hardest stretch for most people. You will walk with a walker or crutches, do your exercises several times a day, and need help at home. AAOS notes that you will need help for several weeks with tasks such as cooking, shopping, bathing and laundry, so it is worth arranging this before surgery.
AAOS's exercise guide says your surgeon and therapist may recommend exercising for 20 to 30 minutes, 2 to 3 times a day, and walking for 30 minutes, 2 to 3 times a day during early recovery (AAOS: Total Knee Replacement Exercise Guide). You can usually move to a single crutch or cane once you can walk and stand for more than 10 minutes without leaning on your walker, which AAOS says is often about 2 to 3 weeks after surgery.
Other milestones in this window, according to the NHS:
- Stitches or clips are usually removed after about 10 days.
- Keep your leg raised as much as possible to reduce swelling.
- Do not sleep with a pillow under your knee, and do not sit with your legs crossed for the first 6 weeks.
- Avoid twisting the knee, bending down and reaching up as much as possible.
On stairs, AAOS recommends leading with your good leg going up and your operated leg going down ("up with the good, down with the bad"), always using a handrail.
When can you walk normally and get back to daily life?
AAOS says you should be able to resume most normal activities of daily living within 3 to 6 weeks after surgery. Some pain with activity and at night is common for several weeks. The NHS suggests trying to walk without an aid after about 6 weeks if you feel ready, and says most people wear compression stockings for at least 6 weeks. You will usually have a follow-up appointment around the 6-week mark to check your progress.
Fear of moving the new knee is common and can slow people down. Our summary of a review of 11 trials on exercise-based rehab for fear of movement covers what helped.
When can you drive after a knee replacement?
AAOS says most people resume driving about 4 to 6 weeks after surgery, once the knee bends enough to get in and sit comfortably and your muscle control is good enough to brake and accelerate safely. The NHS advises waiting at least 6 weeks after a total knee replacement, or 3 weeks after a partial one, and checking with your doctor that you are fit to drive.
When can you go back to work?
The NHS says most people return to work after about 6 to 12 weeks, depending on the type of work. The NHS also advises avoiding household tasks that involve lifting or moving heavy things, such as vacuuming or carrying shopping, for the first 3 months.
How long does full recovery take?
Longer than most people expect. The NHS says it may take several months or longer to fully recover.
It also helps to know what "recovered" looks like. AAOS says full range of motion is uncommon after a knee replacement. Surgeons generally expect an average of about 115 degrees of bend, and most people can almost fully straighten the knee and bend it enough to climb stairs and get in and out of a car. Numbness in the skin around the scar, some stiffness with deep bending, and clicking from the metal and plastic parts are all common and usually become less noticeable over time. Kneeling may be uncomfortable but, according to AAOS, is not harmful. The NHS says not to kneel on the new knee until your doctor says you can.
Most people get major pain relief, but not everyone. A systematic review of prospective studies found that between about 10% and 34% of people reported an unfavourable long-term pain outcome after knee replacement, and about 20% in the best-quality studies (Beswick et al., BMJ Open 2012). If your pain is not improving as expected, tell your surgeon rather than waiting it out.
What can speed up knee replacement recovery?
Doing the exercises. AAOS says the success of the surgery depends largely on how well you follow your surgeon's instructions at home in the first few weeks, and that exercise is a critical part of home care. The NHS adds that following the exercises early on helps long-term strength and movement.
Preparing before surgery. Setting up your home helps: AAOS suggests handrails on stairs, safety bars in the shower, a firm chair with arms, a raised toilet seat if needed, removing loose rugs and cords, and if possible a temporary living space on one floor. Some people also do exercise before surgery (prehab). We covered a small trial of remote prehab programs in which all the approaches improved function.
Not relying on gadgets. Continuous passive motion (CPM) machines, which slowly bend and straighten the knee for you, are still used in some places. A Cochrane review of 24 trials with 1,445 people found moderate-quality evidence that CPM does not have clinically important effects on knee bend, and low- to moderate-quality evidence of no important effect on pain, function or quality of life (Harvey et al., Cochrane 2014).
Surgical technique matters less than many people assume. A review of 24 trials found robotic knee replacement gave no better pain relief or function than standard surgery.
What warning signs during recovery need a call to your doctor?
AAOS lists these signs that need prompt attention:
- Possible blood clot in the leg: increasing calf pain, tenderness or redness above or below the knee, or new or increasing swelling in the calf, ankle and foot.
- Possible clot in the lungs (an emergency): sudden shortness of breath, sudden chest pain, or localized chest pain with coughing.
- Possible infection: persistent fever above 100°F, chills, increasing redness, tenderness or swelling of the wound, drainage from the wound, or knee pain that keeps getting worse with both activity and rest.
Serious complications are uncommon. AAOS says a knee joint infection occurs in fewer than 2% of patients. Falls are another real risk in the first few weeks, so use your walking aid and handrails until your balance and strength return.
What can you do long term with a new knee?
AAOS lists unlimited walking, swimming, golf, driving, light hiking, biking, ballroom dancing and other low-impact sports as realistic activities. Most surgeons advise against running, jogging, jumping and other high-impact sports for life, because heavy use can speed wear of the plastic spacer. The good news on durability: AAOS says more than 90% of modern total knee replacements are still functioning well 15 years after surgery.
The bottom line
Expect the first 2 to 3 weeks to be the toughest, most daily activities to return by about 6 weeks, work around 6 to 12 weeks, and steady gains for several months after that. Consistent exercise, a prepared home and realistic expectations make the biggest difference. Ask your surgeon for a written timeline, since hospitals and surgeons differ in their protocols.
Frequently asked questions
- How long does it take to recover from a knee replacement?
- Most people get back to most daily activities within 3 to 6 weeks (AAOS) and return to work after about 6 to 12 weeks (NHS), but the NHS says full recovery may take several months or longer.
- How long will I need a walker or crutches after knee replacement?
- AAOS says many people move to a single cane or crutch about 2 to 3 weeks after surgery, and the NHS suggests trying to walk without an aid after about 6 weeks if you feel ready.
- When can I drive after a total knee replacement?
- AAOS says most people drive again about 4 to 6 weeks after surgery. The NHS advises waiting at least 6 weeks after a total replacement (3 weeks after a partial) and checking with your doctor first.
- Is it normal to still have pain months after knee replacement?
- Some pain and swelling for several weeks is common. A systematic review found about 10% to 34% of people report an unfavourable long-term pain outcome, so persistent or worsening pain should be checked by your surgeon.
- Will I be able to kneel after a knee replacement?
- AAOS says kneeling is sometimes uncomfortable but not harmful. The NHS advises not kneeling on the new knee until your doctor says you can.
- How long does a knee replacement last?
- AAOS says more than 90% of modern total knee replacements are still functioning well 15 years after surgery.
Sudden severe pain, swelling, or can't bear weight? Seek medical care promptly. In an emergency call 911.