Stairs after a knee replacement: going up, coming down, and when you can start

How do you do stairs after a knee replacement?

One step at a time to begin with, a hand on the rail, and the leading leg swapped between the two directions.

OrthoInfo's exercise guide for this operation sets it out as a sequence that changes as you get stronger, not as one fixed rule. At the start you will need a handrail for support, and a single step at a time is all you will manage. The leg that goes first depends on which way you are heading: lead up the stairs with the knee that was not operated on, and lead down with the operated one. Once you have most of your strength and movement back, you can begin taking them foot over foot. The same guide suggests having someone with you on stairs until that strength and mobility have returned.

Four things mean the sequence below is not yours yet, and they belong before you put a foot on a stair rather than after. A limit on how much weight the operated leg may take. A brace or splint you were told to keep locked straight. A knee you cannot yet straighten under your own power, or hold straight when you lift the leg, or one that has given way on you. And both knees replaced, which leaves no unoperated leg for the order below to use. When stairs start and who says so takes each of those in turn, and in all four the answer comes from the team who operated on you rather than from a page.

The same guide hands you a phrase to take to the bottom of the stairs with you, and at that moment it is worth more than any explanation: up with the good, down with the bad.

Here is the whole of it as a sequence. Your own team's version comes first if they taught you one.

• Going up, with a hand on the rail: step the knee that was not operated on up onto the next stair. Straighten that leg to lift yourself, and bring the operated leg up onto the same stair.
• Going down, with a hand on the rail: put the operated leg down onto the lower stair first, with the knee as straight as it will go. Then bring the other leg down to meet it, which is the leg doing the lowering.
• Take the rail whenever there is one, whichever side it is on, with whichever hand reaches it. OrthoInfo asks for a handrail for balance every time, and the crutch and stick sequences further down this page are built around wherever the rail happens to be.
• One stair at a time, both feet meeting on each stair before you move again, until strength and steadiness let you go foot over foot.
• Have somebody with you at first. OrthoInfo suggests that until you have regained most of your strength and mobility, and the first few times on your own stairs are the ones to have company for.
• If it starts going wrong halfway, stop and sit down on a stair rather than trying to finish standing up. OrthoInfo's advice for anyone unsteady on stairs is to sit and move up or down on your bottom, one stair at a time with the operated leg out in front. It is slower than everything else here and quicker than a fall. Ask your physio or physical therapist to watch you do it once, because getting up off a step is its own job with a new knee.

Both halves of that order protect the same moment: the operated knee bending while it carries your body weight. Going up, the other leg straightens to lift you and the operated knee follows with little to do. Going down, the operated leg goes first because it reaches the lower step with the knee close to straight, so the bending and the lowering fall to the knee that was not operated on. Reverse either one and you have handed the hardest work to the newest joint.

Your own team's instruction sits above all of this. A partial replacement, a revision, or a replacement done after a fracture can come with quite a different plan, and anyone who was given a limit on how much weight the leg may take, or who was told to stay off stairs for now, follows that and not a page. Most people having a straightforward first knee replacement are not given such a limit, because the implant is fixed to the bone during the operation and is built to take weight from the start, which is why you are helped up to walk so soon afterward. Where a limit is given it usually follows a bigger operation than a standard replacement, and it is the surgeon who sets it and the surgeon who lifts it, not a physiotherapist and not a page. A staircase is the worst place to be guessing about one, so if you are unsure whether you were given a limit, ask before you use the stairs rather than afterward. How long you use a walker after a knee replacement sets out what the usual limits sound like when they are given to you. The foot order as a general rule, along with the handrail, the rugs and cables and the footwear advice, is on total knee replacement rehab, which also names the NHS leaflets that teach the same pattern.

Why is coming down harder than going up?

Because the thigh has to work in the direction it finds hardest, and that direction is the one this operation takes longest to give back.

Going up, the thigh shortens to straighten the knee and lift you onto the next step. Going down, it has to pay the weight out slowly: the knee bends while the muscle lengthens and holds you against gravity. Nothing else in ordinary life asks for that much of it on one leg. A knee that has just been replaced is poor at it. That is why a staircase can feel almost easy in one direction and frightening in the other on the same afternoon.

There is a second reason, and it belongs to the operation rather than to the muscle. To get into the knee at all, the surgeon opens the layer at the front that works the kneecap and stitches it back together at the end. Lowering yourself down a step is the heaviest demand ordinary life makes of exactly that structure. So in the first weeks a weak and sore descent is partly a repair still knitting, and not only a thigh out of condition, which is the honest reason descent is given time instead of being pushed. How much had to be opened varies. Most knees need no more than the standard approach, while a very stiff knee, a revision, or a knee replaced after a fracture sometimes needs extra work to get the kneecap out of the way, and anyone in that group is usually given limits of their own. That is a question worth asking your surgeon directly, because the answer changes what the first weeks on stairs should look like for you. It is also why a pop, a tearing feeling, or a sudden inability to straighten the knee or lift the leg straight is a same day call and not a setback to work through: the warning signs below say so, and that is the line to follow.

None of this is a hunch. It has been measured. A 2024 study in the Journal of Physical Therapy Science tested 78 people about three months after a single knee replacement for osteoarthritis on the inner side of the knee, at a mean of 90 days after surgery. They were mostly women, 63 of the 78, with a mean age of 75 years, and they used a four step staircase with steps 18 cm high (about 7 inches) and treads 25 cm deep (about 10 inches). Going up, 8 of them took the stairs one step at a time and 37 used the handrail. Coming down, 34 took them one step at a time and 56 used the handrail, and the four steps took 5.1 seconds on average against 4.4 going up.

All three of those differences were statistically significant, and the authors' conclusion was blunt: rehabilitation after this operation should put more into descent than into ascent (Murakami and colleagues, 2024). The reasons they give all point the same way. The knee extensors have to work in that lengthening way to control your descent, and people after this operation are not good at it. Thigh and hamstring muscles tend to tighten against each other at the same time, which gets in the way of a smooth bend. And going up you can borrow from the hip to take load off the knee, while going down there is nothing to borrow from, so the knee carries what it carries.

Read that study for what it is. One group of 78 people in one country, all of them three months out from a replacement on one side for wear on the inner half of the knee, tested on one staircase, and all of them already able to get up and down stairs with someone supervising, since that was how the group was chosen. It does not tell you what your own flight will feel like. What it does tell you is that the asymmetry is real and common enough to plan around, and that being the person who still comes down one step at a time at three months puts you with about 44 percent of that group rather than on your own.

When can you start using the stairs, and who says so?

Your team says so, and for most people that happens before you leave hospital rather than weeks afterward.

The clearest marker is not a date at all. It is a discharge standard. OrthoInfo lists being able to climb up and down two or three stairs with a walking aid among the things to manage before you go home. That puts stairs inside getting home, not after it. NICE puts the outer limit at 24 hours from the operation, and asks for rehabilitation on the day of surgery itself wherever a service can manage it, so walking and the first steps are early business for the whole team, not something held back.

Notice what is missing. The NHS page on recovering from a knee replacement, which does give figures for walking aids, driving, work and heavy household tasks, says nothing at all about stairs. Neither does the NICE joint replacement guideline. So if a page hands you a week number for stairs, it comes from one hospital's protocol or one surgeon's habit rather than from national guidance anywhere in the United States, the United Kingdom, Canada, Australia or New Zealand. There is no number to be behind.

What replaces the number is a person watching you. NICE also asks that anyone carrying on with rehabilitation on their own is given clear goals and a point of contact for advice and support. That is the number to ring on the evening your own stairs turn out to be nothing like the practice ones. It is not a question to save for the next appointment.

The calendar decides less than two practical things do. Can the operated knee bend far enough to clear a step without you hitching your hip to get it there, and can the thigh be trusted to hold you on the way down? Our stair climbing and step up pages are the practice itself, and both sit in the later stage of the main program, not the first week. Your physio or physical therapist will adjust how much of it you do.

Four situations turn this from a technique question into a not yet. If you were given a limit on how much weight the operated leg may take, a flight of stairs cannot be managed inside that limit on your own, so the limit has to be lifted or a sequence set for you by the team who gave it. If you are wearing a brace or splint you were told to keep locked straight, do not unlock it to get a step done, and ask to be shown how a flight works while it is on. If you cannot yet straighten the knee under your own power or hold the leg straight when you lift it, or the knee has given way on you, then the thing that holds you on a descent is not ready, and stairs on your own wait until you have been checked. And if both knees have been replaced, either at the same operation or within a few months of each other, the leading leg order on this page has no unoperated knee to use, so your team sets the pattern rather than this page. OrthoInfo's own discharge list includes walking with an aid and managing two or three stairs, and understanding any knee precautions you were given, and it says plainly that where those goals are not met, or there is nobody to help you at home, going straight home may not be safe. A flight at home is a larger ask than the two or three steps the ward checked.

If you have had a fall in the last 12 months or feel unsteady, keep a hand on the rail for every step, use your walking aid, and keep your stair practice to times when someone else is at home, because a fall onto a new knee can damage it. If you live alone, ask your physio or physical therapist to plan your own stairs with you rather than working them out by yourself.

One step at a time, and when you can go back to one foot per step

One step at a time means both feet meet on each stair before you move again. One foot per step, which OrthoInfo calls foot over foot, is how you climbed stairs before the operation.

OrthoInfo's exercise guide puts the change on strength and movement rather than on a week: a handrail and single steps at first, foot over foot as you become stronger and more mobile. No source we could find attaches a date to it. That is not evasion. The two things it waits for arrive at different speeds in different people.

In clinic the change almost always happens on the way up weeks before it happens on the way down, and it is worth expecting that order instead of fighting it. It matches what the Murakami group measured, where 8 of the 78 were still taking single steps going up at three months while 34 were doing so coming down. Treat it as two separate graduations. Take the ascent foot over foot when it feels unhurried and the handrail is a formality, and leave the descent on single steps for longer than you think you need to, because that is the direction a mistake costs something.

The strength for the second graduation is built away from the staircase. Quad sets and short arc quads wake the thigh up, sit to stand is the same lowering job through a smaller range with a chair behind you, and the slow-lowering eccentric squat trains exactly the control that descent asks for. All four are in the main program with their doses and their depth limits, and the program is where to take them from, not from here. Ask your surgeon or physio before you start the squats and how deep you may go.

Stairs with crutches, with a stick or cane, and with only one rail

The aid changes the sequence, and the version most people are taught is the one with a rail on one side and the crutches on the other.

The clearest published version we could read is the University of Utah Health joint replacement guide, which covers both the flight with a rail and the flight without one. With a rail, put both crutches under the arm on the side away from the rail and take the rail with your free hand. Going up: the good leg to the next step with the operated leg trailing, then straighten the good leg and bring the crutches and the operated leg up to join it. Going down: the crutches go to the lower step first, the operated leg comes down to meet them, your weight shares between the crutch and the rail, and the good foot comes down last. Without a rail at all, the crutches stay on the step you are standing on while you step the good leg up, and they go down a step first on the way down.

Three details decide whether crutches help you on a staircase or trip you on it, and they come from the same guide and from OrthoInfo's advice on walking aids. Your weight goes through your hands, never through your armpits, because resting it on the underarm supports for any length of time can damage the nerves and blood vessels there. Keep the crutch tips two to three inches out to the side of your feet, so you are not standing on one of them on a narrow tread. And where there is no rail at all, your weight shares between the two crutches on every stair: going up they stay on the stair you are standing on while the unoperated leg steps up, and going down they both go to the lower stair first, then the operated leg, with the other leg last.

With one stick or cane, the sequence is shorter, and OrthoInfo's guide to walking aids sets it out. Hold the cane in the hand opposite the operated leg, take the rail with your free hand, and going up, step up with the unoperated leg first and bring the operated leg up after it. Coming down, the cane goes onto the lower stair first, then the operated leg, then the unoperated leg last, because that is the one carrying your weight as you arrive. Where the rail is on the side the cane would have gone, take the rail and move the cane to your other hand. A fixed rail is the better of the two supports, and that part is how we teach it rather than something OrthoInfo states.

That arrangement answers the question people ask most: what to do when the only rail is on the wrong side. It is not the wrong side. The method puts the crutches wherever the rail is not, so the rail decides which arm takes them and you follow it, and the guide is plain that a handrail is used whenever one is available. A flight with no rail at all is a different matter. The NHS falls advice includes fitting safety rails on steps among the changes worth making at home, so a bare staircase is something to have a rail put on, not a detail to work around, and the no-rail sequence above is one to have watched by a physiotherapist or physical therapist before you use it alone.

The names change by country and the equipment does not. The wheeled or four-legged frame is a walker in the United States and Canada and a frame or Zimmer frame in the United Kingdom, Australia and New Zealand, and a frame does not go up stairs at all. The single support is a cane in North America and a walking stick elsewhere, and walking with a cane is the technique to get right on the flat before you take it to a staircase. Crutches are crutches everywhere, with the forearm sort called elbow crutches in the UK and Australasia. Which aid you are on, and when each one goes, belongs to how long you use a walker after a knee replacement rather than to this page.

One more thing the aid takes from you, and it catches people out at the bottom of the stairs. A hand on the rail and a crutch under the other arm leaves nothing to carry with. A bag over the shoulder works, two trips work, and leaving it at the foot of the stairs for somebody else works. The NHS also asks you to keep away from lifting or moving anything heavy around the house for the first 3 months, and the shopping going upstairs is exactly that job.

The first flight on the day you come home

The day you come home is the day the stairs stop being theoretical, and it goes better when it was settled on the ward. The car that gets you to the bottom of them comes first, and being a passenger, along with when you can drive yourself, is covered on driving after a knee replacement.

Hospital stairs are straight, evenly built and usually have a rail on both sides. Home stairs have a turn in them, a winder at the bottom, a rail that stops short, or a step down into a kitchen that nobody counts as a step. Those are the details to raise with the ward physio while you still have one in front of you, along with a specific question: show me how this changes on a turn, where I cannot put both feet level on a single tread.

OrthoInfo's advice for the first weeks includes temporarily changing rooms, making the living room your bedroom for example, to cut down how often you use the stairs at all. That is a reasonable plan and not a defeat. Preparing the house, moving a bed and getting hold of equipment are covered by what to pack and prepare at home, and all of it is easier to do before the operation than after.

Plan the number of trips rather than the technique. Most people manage the stairs on the day they come home and then do them four more times before bed because the bathroom is upstairs and the kettle is downstairs. Decide what lives upstairs and what lives downstairs before you are tired, and put a charged phone in a pocket rather than on a windowsill. OrthoInfo's advice for anyone on a walking aid asks for the stairs kept clear of packages, boxes and clutter, with treads added if they are slippery, and for walking only in well-lit rooms with a nightlight on the route between the bedroom and the bathroom. A staircase you take four more times before bed deserves that much.

Lightheadedness when you first stand is common after this operation and a landing is a poor place to meet it. Stand still for a moment, let it settle, and only then take the first step down. If it is new for you, does not pass in a minute or two, keeps happening or has already made you stumble, the warning signs at the foot of this page say what to do and how quickly.

Steps, curbs and thresholds, which are not stairs

A flight of stairs has a rhythm and usually a rail. A single step has neither, and that is what trips people who have been managing the staircase at home for a fortnight.

OrthoInfo's exercise guide puts a ceiling on the single step. Do not climb anything taller than a standard step, a height it puts at 7 inches, which is about 18 cm, and always use a handrail for balance. The steps worth measuring are the ones nobody files as steps. A back door onto a patio, a step up into a garage, the drop out of a conservatory, and the step onto a bus or a train, which is often taller than anything in your house and has a moving handrail or none.

A curb, or kerb depending on where you are reading this, is the one with no support at all. Where a dropped section exists, use it even if it means walking further to reach it, and where it does not, treat the curb as a step you take one leg at a time with the same order you use on stairs. Carrying something changes it completely, because the arm that would have steadied you is holding a bag.

Thresholds and door sills are a trip rather than a strength problem, and they matter most to anyone still using a frame or walker, which will not lift cleanly over them. That is practice experience rather than a published rule, but it is the thing we see catch people in their own hallway. Balance and falls prevention is the program for anyone who is older, has fallen in the past year or feels unsteady, and starting it alongside the knee work beats starting it after a fall.

Why do stairs still hurt months later?

Usually because the thigh's job of controlling the bend under your weight is the last part to come back, and months out it is still catching up.

The same mechanism that makes descent hard in week three makes it ache in month four. Load through the kneecap and the tendons at the front of the knee climbs as the knee bends further under weight, and the main program explains that with its source. A staircase is that bend repeated twenty times with your whole weight on one leg. Knee pain on stairs covers the pain itself, and knee pain when bending covers the front of the knee more generally.

Check three other things before you accept it as normal. A knee that will not come fully straight makes every descent harder, and straightening gets less attention than bending because it feels less dramatic. Swelling that turns up in the hours after a flight of stairs rather than during it is the usual signal of having done a bit too much, and how long swelling lasts after a knee replacement is the guidance to use for it. And the other knee, the hip and the back often take over for a few weeks, so pain somewhere other than the new joint is a separate problem rather than slow progress.

One pattern on this list is not a training question at all, and it has its own line below. Pain that is new or worse when you put your weight through the operated leg, or a limp that has stopped improving, goes to your physio or surgical team within a few days rather than into more practice, because that is also how a loosening implant or a crack in the bone around it first announces itself, and stairs load the leg harder than anything else you do at home.

The thing not to do is the thing most people do: use the stairs less. OrthoInfo's exercise guide calls stair climbing an excellent strengthening and endurance activity that also needs flexibility, which is to say that stairs are the training for stairs. Avoiding them protects the knee from the one load that would improve it, and the descent is the half that disappears first and comes back last. None of that overrides a restriction your own team has given you, and if they have told you to stay off stairs, that stands.

If you are months out and still cannot come down one foot after the other, ask for more help rather than more time. NICE recommends supervised outpatient rehabilitation, in a group or one to one, for people who are having difficulty with daily activities, who have an ongoing loss of function with particular rehabilitation needs, or who are not meeting their goals on their own. A staircase you cannot descend is all three of those at once. The exercises for weeks 2 to 6 and the exercises for weeks 6 to 12 carry the strength work this needs, and the recovery timeline week by week sets out how long the whole arc takes with a source on each stage.

When a problem on the stairs needs help, and how quickly

A fall on a staircase after this operation is not the same event as a fall on a flat floor, so treat it as its own category. If you cannot put weight on the leg afterward, the knee or thigh is very painful, or the leg looks out of shape or shorter than the other, that is an emergency department rather than a phone call, and you should not drive yourself there. A smaller knock still counts: if the knee is newly painful, swollen or bruised even though you can walk on it, go back to your crutches or sticks, keep your weight off that leg and have it looked at the same day, because a break in the bone around a new knee is not always obvious at first.

Why a fall gets that much weight is worth spelling out, because it is the one event on a staircase that changes an operation that went well into one that needs doing again. OrthoInfo's page on a break in the bone around a knee replacement says these breaks are most commonly the result of a fall, and that most of them need surgery. The things it names as raising the risk are the ordinary ones: having more risk factors for a fall, such as muscle weakness, poor vision or poor balance, and having a condition that weakens bone, such as osteoporosis. A new knee replacement brings the first of those with it for a few weeks, whatever shape you were in before. So if your eyesight has got worse, if you are unsteady, or if you have been told you have thin bones, you are not being over-careful by keeping a hand on the rail, keeping the aid you were given and having somebody within earshot while you learn your own stairs.

The reason a staircase deserves more respect than a corridor sits in two sentences from OrthoInfo, and they are worth having in full. OrthoInfo warns that a fall in the first few weeks after surgery can damage the new knee and may lead to further surgery. OrthoInfo names stairs as a particular hazard until the knee is strong and mobile, and advises using a cane, crutches, a walker or a handrail, or having someone help you, until your balance, flexibility and strength have improved.

A knee that gives way is the stair symptom to act on fastest short of a fall, because the staircase is where giving way does the most damage. Contact your physio or surgical team within the next few days, hold a rail and use your aid every time, and stay off stairs on your own until you have been seen. The same applies if the knee has stopped bending or straightening any further from week to week, since a stiff knee is easier to free up early than late and the date you raise it matters.

Two problems show up on stairs before they show up anywhere else, and both deserve a same day call. A foot that drags, catches or slaps down, which is what trips you on a tread. And a knee that is getting hotter, redder, more swollen or more painful rather than less, or pain that keeps building both when you move and when you rest, which can be an infection around the new joint and not a stairs problem at all. New numbness or tingling in the lower leg or foot, dizziness on standing that does not settle, and sudden breathlessness or chest pain each have their own line and their own urgency in the warning signs below, and that list is the one to read rather than this paragraph.

Related exercise programs

• Total knee replacement rehab
• Balance and falls prevention

Common questions

References

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Written and checked by the PocketPhysio editorial team. Last updated 2026-10-17.

This page is general education, not a diagnosis or a personal treatment plan. See a physiotherapist or doctor for advice about your own situation.