Knee pain on stairs: common causes and what helps

Knee pain on stairs is common and usually mechanical. Here is why steps load the knee, what usually causes the pain, and what helps.

Stairs are often where a sore knee first makes itself known. Going up, you feel an ache around the kneecap or a sense of effort. Going down, the knee may twinge, feel unsteady or catch. Many people start gripping the rail, taking one foot at a time, or avoiding stairs altogether.

There are several possible causes, but the most common is patellofemoral pain, an ache around or behind the kneecap. This guide covers why stairs load the knee, how the usual causes differ, how to ease the strain while you recover, the exercises with the most research support, and when to have the knee checked.

Why do stairs make a sore knee hurt?

On level ground your knee stays fairly straight and the thigh muscles do modest work. On a stair, the knee bends under your whole body weight while the quadriceps (the large muscles at the front of the thigh) lift you or lower you under control, and the kneecap presses into a groove at the end of the thigh bone like a pulley.

Researchers have put numbers on this. In a gait study of 35 healthy young adults, the peak force across the kneecap joint was estimated to be about 8 times higher climbing stairs than walking on the flat, and the largest contact forces occurred with the knee well bent, where the contact area is smaller. Measurements from five people with sensor-fitted knee replacements found the peak force through the joint averaged about 3.5 times body weight going down stairs, 3.2 going up and 2.6 on the flat. These are everyday loads that a healthy knee is built to handle, but an irritated or weakened knee notices them first.

Is knee pain worse going up or down stairs?

It depends on the cause, and the direction alone is a weak clue. The clinical practice guideline for patellofemoral pain lists both going up and going down stairs among the movements that bring it on, alongside squatting, prolonged sitting, jumping and running. What changes is the job your muscles are doing:

• Going up: the thigh and buttock muscles shorten to push you upward over a bent knee, so weak muscles or an irritated kneecap joint show up as an ache or effort at the front of the knee.
• Going down: the same muscles lengthen to brake your descent, which takes strength and control. In the knee-replacement measurements the joint load was highest on the way down, and a knee that twinges or feels unsteady going down can mean the muscles are struggling to control it.

More useful than the direction is where the pain sits, what else brings it on (long sitting, squatting, twisting, the first steps after rest) and whether the knee swells, catches or gives way.

What are the common causes of knee pain on stairs?

Four causes account for most stair-related knee pain. They overlap, and more than one can be present at once.

Patellofemoral pain (pain around the kneecap)

The guideline describes a poorly defined ache around or behind the kneecap that worsens with loaded, bent-knee activities: squatting, sitting for long periods, stairs, jumping and running. It can recur and, in some people, persist for years. If a scan report says “chondromalacia”, our guide to chondromalacia patellae explains how that older term relates.

Knee osteoarthritis

Wear-and-tear arthritis often makes stairs harder. A systematic review found consistent evidence that better stair-climbing in people with knee osteoarthritis was linked to stronger leg muscles and less knee pain, both of which can be worked on. Our guide to knee osteoarthritis covers treatment in detail.

Patellar tendinopathy

The patellar tendon links the kneecap to the shin bone. Tendinopathy typically causes pain just below the kneecap that rises with the demand on the thigh muscles, mainly in jumping and running, though stairs taken quickly or repeatedly can provoke it. It is diagnosed from your history and an examination rather than a scan, and rehabilitation is built around gradually increasing the tendon’s tolerance to load.

Meniscus tear

The menisci are two C-shaped cartilage pads that cushion the knee. A review of degenerative meniscus problems notes that joint-line tenderness and mechanical catching or locking can be highly suggestive of a meniscus source, and that long-term outcomes with non-surgical care and keyhole surgery are similar for most patients. Our guide to a meniscus tear goes through the options.

Should I stop using the stairs? Technique that eases the load

Staying off stairs completely is rarely the answer, because the muscles that protect the knee need to keep working. The aim is to keep pain mild while the knee settles.

1. Use the handrail to share the load.
2. Lead with the stronger leg going up and the sorer leg going down. Physios often teach this as “up with the good, down with the bad”: the stronger leg does the lifting on the way up and the controlled lowering on the way down.
3. On a bad day, take one step at a time, bringing both feet onto each step, and pause on the landing.
4. Pace your trips. Group tasks to cut down the number of flights, and avoid carrying loads that stop you using the rail.

These are short-term tools. The longer-term fix is a stronger hip and thigh.

Which exercises help knee pain on stairs?

For patellofemoral pain, strengthening the hips and thighs together has the clearest research support. A 2015 systematic review of 14 studies (seven of high quality) found strong evidence that adding hip exercises to quadriceps exercises reduced pain and improved function in the short term, and moderate evidence at medium term. The evidence for a long-term advantage was more limited, but the authors concluded that hip strengthening belongs in conservative management. Other causes need a different emphasis (a sore tendon needs carefully progressed loading, for example), so your physio will tailor the programme.

A starter routine

1. Sit-to-stand: from a firm chair, standing up and sitting down slowly (about 3 seconds to lower). 2 to 3 sets of 8 to 12.
2. Step-ups: onto a low step, holding the rail. 2 to 3 sets of 8 to 10 each leg.
3. Slow step-downs: from a low step, slowly lower the other heel towards the floor, then return. 2 sets of 6 to 8 each leg. This trains the “going down” job directly.
4. Wall sit: knees bent only as far as is comfortable. Hold 20 to 30 seconds, 3 times.
5. Side-lying leg lift: lift the upper leg slightly behind you, toes forward. 2 to 3 sets of 10 to 15 each side.
6. Glute bridge: lift the hips, hold 2 seconds, lower. 2 to 3 sets of 10 to 12.

As general starting points, do these about 3 times a week on non-consecutive days. A mild ache of about 2 to 3 out of 10 that has settled by the next day is a common guide. Stop an exercise if it sharply increases your pain, and see a health professional if the knee locks, gives way or swells.

How long does knee pain on stairs take to improve?

There is no honest single answer: it depends on the cause, how long you have had it and what you do about it. A review of patellar tendinopathy warns that rehabilitation can be slow and that unrealistic time frames are a common pitfall, and kneecap pain can recur and persist for years in some people, so the aim is strength that lasts rather than resting until it quietens. After an examination, your physio can give a more realistic timeframe and review progress against clear markers, such as how many flights you manage.

When to see a physio or doctor

See a physio if pain on stairs keeps coming back, lasts more than a couple of weeks, limits your work, sport or daily life, or you are not sure what is causing it.

See a GP, or go to an emergency department, if:

• The knee becomes suddenly hot, red and swollen, especially with a fever or feeling unwell
• You have had a fall or twisting injury and cannot put weight on the leg, or the knee looks out of shape
• The knee locks and will not fully straighten, or gives way repeatedly
• Your calf becomes swollen, warm and painful (call 000 if you also have sudden breathlessness or chest pain)
• The pain is constant at rest or wakes you at night, or comes with unexplained weight loss

How UpPlus Physiotherapy helps

At UpPlus Physiotherapy in Seaton, a knee assessment starts with your story: where the pain sits, what brings it on and how stairs, squats and sitting affect it. We watch how you move on a step, test your hip and thigh strength, examine the knee and check the hip, ankle and lower back. We explain what we find in plain language and build a graded exercise rehabilitation plan around your stairs, work and sport, with advice on pacing and technique and, where needed, a referral for imaging or an orthopaedic opinion.

Read more about patellofemoral pain, patellar tendinopathy and knee osteoarthritis.

Finding a physio near me for knee pain on stairs

Look for a physio who watches you do a step or a squat rather than only examining the knee, tests your hip and thigh strength, explains the likely cause, and gives you a progressive plan with clear markers.

Our clinic is at 177 Trimmer Parade, Seaton, a short drive from Woodville, Findon, West Lakes, Grange and Henley Beach.

If stairs have become something you plan around, our physiotherapists can work out why and build a plan with you. Book online or call 0403 907 587.

This article is general information, not a diagnosis or a substitute for an individual assessment. If you are unsure about your symptoms, see a health professional.