You can usually begin climbing stairs within the first two weeks after surgery, but only with support and under specific conditions

Most NHS physiotherapists clear patients to start stair climbing between 7 and 14 days after total knee replacement, once you can bend your knee to roughly 90 degrees and have enough strength to control your weight on the operated leg. The exact timing depends on your individual recovery—how much swelling you have, your pain level, and how well you're managing crutches or a walking frame. Your physiotherapist will assess you before you attempt stairs, not the other way around.

The first time you climb stairs, you will need a handrail and either crutches, a walking frame, or another person for balance. You will go slowly, one step at a time, leading with your unaffected leg when going up and your affected leg when coming down. This pattern—"up with the good, down with the bad"—protects your healing knee from bearing too much weight too quickly.

Key Takeaways

  • Stair climbing usually begins between one and two weeks after surgery, once you can bend your knee to 90 degrees and have adequate strength.
  • You must use a handrail and either crutches or a walking frame for the first several weeks, and go one step at a time.
  • Your NHS physiotherapist will assess your readiness before you attempt stairs—do not start on your own timeline.
  • Pain and swelling are normal during stair climbing in early recovery, but sharp pain or instability means you should stop and contact your physiotherapy team.
  • Most people can climb stairs without aids by 6 to 8 weeks after surgery, though some take longer depending on their progress.

What your physiotherapist checks before clearing you for stairs

Your NHS physiotherapist will test three things before you attempt your first staircase. First, they measure how far you can bend your knee—you need at least 90 degrees of flexion, ideally more. Second, they assess your strength by watching you stand from a chair, walk a short distance, and lift your operated leg slightly off the ground. Third, they check your balance and confidence on crutches or a walking frame on level ground.

If you have significant swelling, cannot bend your knee past 70 or 80 degrees, or feel unstable on your aids, your physiotherapist will give you exercises to work on before attempting stairs. This is not a setback—it is the normal process. Some people are ready at day 7; others need until day 14 or beyond. Pushing too early can cause a setback in your swelling and delay your overall recovery by weeks.

The correct technique for climbing and descending stairs

When climbing stairs, lead with your unaffected leg first. Place your crutch or walking frame on the step above, then step up with your good leg, then bring your operated leg up to meet it. Use the handrail with your free hand for balance. Move slowly and deliberately—there is no benefit to speed.

When descending, reverse the pattern: lead with your operated leg first, then follow with your good leg. This keeps your stronger leg in control as you lower your body weight. Again, use the handrail and move one step at a time. Descending is often harder than ascending because it requires more control and places more stress on your healing knee, so take extra care.

If you live in a house with stairs and cannot avoid them, ask your physiotherapist about temporary arrangements—sleeping downstairs, using a stair lift if available, or having someone stay with you. Some NHS trusts can arrange temporary equipment loans. Do not attempt stairs alone until you are confident and have been cleared to do so without aids.

Pain, swelling, and when to stop

Mild to moderate pain during stair climbing is normal in the first few weeks. You may feel a dull ache, tightness, or heaviness in your knee. Swelling often increases after activity and may be worse the next morning. Both are expected and do not mean you have damaged your repair.

Stop climbing stairs and contact your physiotherapy team if you experience sharp, stabbing pain; a feeling that your knee is giving way or unstable; significant increase in swelling within a few hours; or warmth and redness around your incision. These can signal a problem that needs assessment. Pain that is manageable with paracetamol or ibuprofen (if you tolerate it) and settles within an hour or two is usually safe to continue with.

Ice your knee for 15 to 20 minutes after stair climbing if swelling increases. Elevate your leg above heart level when you rest. These steps help manage inflammation and allow you to do more the next day.

How your stair climbing will progress over weeks

Weeks 1 to 2: You climb stairs with a handrail and crutches or a walking frame, one step at a time, with your physiotherapist or a family member present. You may only manage a few steps before fatigue or discomfort stops you.

Weeks 3 to 4: You may reduce to one crutch or drop the walking frame entirely, though you still use the handrail. You can climb more steps in one go, though you still move slowly and deliberately.

Weeks 5 to 8: Most people can climb stairs with just the handrail, without crutches or a frame. You may be able to climb at a near-normal pace, though you still move carefully. Some people are ready to climb without holding the handrail by week 8, but this varies widely.

Beyond 8 weeks: By 12 weeks, most people climb stairs without thinking about it, though some residual caution is normal. Full confidence and speed often return by 3 to 4 months, depending on your overall recovery and any complications.

What to do if you are not ready by two weeks

If you cannot bend your knee to 90 degrees or feel too weak or unstable to attempt stairs by two weeks, this does not mean your recovery is failing. Some people progress more slowly, and that is acceptable. Your physiotherapist will give you specific exercises to build strength and range of motion.

Common reasons for slower progress include higher pain levels, more swelling than average, or pre-existing stiffness in your knee. Continuing your home exercises, managing swelling with ice and elevation, and attending all physiotherapy appointments will help you progress. Pushing yourself too hard too fast can cause a setback that delays everything else.

If you have concerns about your progress, discuss them with your physiotherapy team at your next appointment. They can adjust your plan or refer you for additional support if needed.

Stairs in your home versus public stairs

Your home stairs and public stairs (in shops, offices, or public buildings) may feel different. Home stairs are often narrower, have different step heights, and may not have handrails on both sides. Public stairs are usually wider and more standardized, but they can be busier and more intimidating when you are still recovering.

Practice on your home stairs first with your physiotherapist or a family member present. Once you are confident at home, you can attempt public stairs, but choose quieter times and always use the handrail. If you feel unsteady or tired, stop and rest—there is no shame in taking the lift or asking for help.

Frequently Asked Questions

Can I climb stairs before my physiotherapy appointment?

No. Wait for your physiotherapist to assess you first. Attempting stairs without clearance can cause swelling, pain, and setbacks in your recovery. Your physiotherapist will tell you when it is safe to start and will teach you the correct technique.

What if I live in a flat with no lift and stairs are the only way in and out?

Tell your NHS team about this before or when ready after surgery. Some trusts can arrange temporary equipment like stair lifts or grab rails. You may also be able to stay with family or friends for the first two weeks, or arrange for someone to help you manage stairs. Do not attempt stairs alone without clearance from your physiotherapist.

Is it normal for my knee to swell more after climbing stairs?

Yes. Activity causes swelling in the first few weeks after surgery. Ice your knee for 15 to 20 minutes after climbing stairs, elevate it, and rest. If swelling is severe or does not settle within a few hours, contact your physiotherapy team. Mild swelling that settles overnight is normal and does not mean you have harmed your repair.

Can I climb stairs without a handrail once I am off crutches?

Not when ready. Even once you stop using crutches, continue using the handrail for several more weeks. Your knee is still healing and your balance may not be fully restored. Your physiotherapist will tell you when it is safe to climb without the handrail—usually around 8 to 12 weeks after surgery.

What if climbing stairs causes sharp pain?

Stop when ready and rest. Sharp pain is different from the dull ache or heaviness that is normal during recovery. Contact your physiotherapy team or your GP to describe the pain and get information. Do not attempt stairs again until you have been assessed.