Knee Osteoarthritis Exercises: 7 Moves That Ease Pain Instead of Making It Worse

At a Glance

The best knee osteoarthritis exercises strengthen the muscles around the joint. Here are 7 safe moves, the science behind them, and mistakes to avoid.

📋 What You’ll Learn

1. What Is Knee Osteoarthritis and Why Do Exercises Matter?
2. What Does Science Say?
3. Which Exercises Actually Work?
4. How Do You Use a Warming Balm for Best Results?
5. What Mistakes Do Most People Make?
6. Frequently Asked Questions
7. The Bottom Line

Here is something most people with a worn knee never hear at the point of diagnosis: the strength of your thigh muscles may matter more for your future than the amount of cartilage left on the scan. Imaging research presented to the Radiological Society of North America found that people with a higher quadriceps-to-hamstring muscle volume had significantly lower odds of ending up with a total knee replacement.

That is a hard message to hear when your knee already aches on the stairs. Moving the joint that hurts feels like the last thing you should do, so most people rest it, the muscles shrink, and the joint takes even more of the load. The cycle tightens.

The good news is that the right knee osteoarthritis exercises break that cycle, and they are simpler than you think. Below you will find seven moves that are safe for an arthritic knee, what the evidence actually shows, how to use a warming balm to make the first minutes bearable, and the mistakes that send people back to the sofa.

Research Spotlight

A stronger quadriceps-to-hamstring ratio was linked to significantly lower odds of needing a total knee replacement

Radiological Society of North America, 134-participant imaging study

Knee osteoarthritis is the gradual breakdown of the cartilage that cushions the ends of your thigh bone and shin bone, plus changes in the bone, the joint lining and the surrounding soft tissue. It is a whole-joint condition, not just worn padding, which is exactly why muscle plays such a large role in how it feels.

When cartilage thins, the joint loses some of its shock absorption. The muscles crossing the knee, mainly the quadriceps at the front and the hamstrings at the back, have to take up that job. Strong muscles decelerate your body weight on every step and every stair. Weak ones let the load land on the joint surfaces.

This is why the pain pattern is so often described as worse on stairs, worse getting out of a chair and worse after long sitting. All three are moments where the quadriceps has to control body weight through a bent knee. If the muscle cannot do it, the joint absorbs the difference.

There is also a self-reinforcing loop that catches almost everyone. Pain makes you move less. Moving less weakens the quadriceps within weeks. A weaker quadriceps increases joint loading and stiffness, which increases pain. Exercise is the only intervention that reverses the loop rather than just muting the signal at the end of it.

That matters for expectations too. Painkillers and creams work on comfort. Exercise is the only part of the plan that changes the mechanics. The best results come from doing both, using comfort measures so that you can actually complete the training, rather than treating them as alternatives.

The evidence for exercise in knee osteoarthritis is among the strongest in musculoskeletal medicine, though it is more nuanced than the headlines suggest.

The 2024 Cochrane review of exercise for knee osteoarthritis pooled 139 trials and 12,468 participants, which makes it the largest evidence base on this question. Compared with placebo or attention control, exercise improved pain by about 8.7 points and physical function by about 11.3 points on a 0 to 100 scale. The review was deliberately strict, comparing exercise against placebo rather than against doing nothing, so those numbers are a conservative floor rather than a ceiling. Against usual care, the measured benefits are larger.

On the strengthening side, a randomised four-arm controlled trial published in 2023 compared different muscle strengthening protocols in people with knee osteoarthritis. Combined quadriceps and hamstring strengthening produced the best outcomes for pain and morning stiffness, with the effect on pain scores and stiffness reaching statistical significance at p less than 0.001. Training the front of the thigh alone was helpful, but training front and back together was better.

The imaging work is the most striking. In a study of 134 participants presented to the Radiological Society of North America, researchers measured thigh muscle volume on MRI and found that a higher quadriceps-to-hamstring ratio was significantly associated with lower odds of total knee replacement. The balance between the two muscle groups appeared to matter, not just raw size.

For the aerobic side, a network analysis of 217 trials reported by Harvard Health found that lower-impact aerobic exercise, specifically walking, cycling and swimming, was the most effective category for reducing knee osteoarthritis pain and improving function. Mayo Clinic gives the same practical advice: low-impact work such as walking, cycling or water exercise, stopping if you feel new joint pain.

Put together, the picture is consistent. Strengthen the quadriceps and hamstrings, add low-impact aerobic work, and keep going for long enough to let muscle adapt.

Which Knee Osteoarthritis Exercises Actually Work?

Seven moves cover almost everything an arthritic knee needs. Start with two or three, do them on alternate days, and add the rest as they get easy.

1. Straight leg raise

Lie on your back, one knee bent, the other leg straight. Tighten the thigh of the straight leg and lift it about 30cm. Lower slowly over three seconds. This loads the quadriceps with almost no movement at the joint itself, which makes it the safest starting point for an irritated knee. 2 sets of 10 per leg.

2. Sit-to-stand

Stand up from a dining chair and sit back down without using your hands, controlling the descent rather than dropping. This is the single most functional move on the list because it trains the exact pattern that hurts. 2 sets of 8 to 12.

3. Wall sit

Back against a wall, slide down until your knees are bent 30 to 45 degrees, no deeper. Hold 10 to 20 seconds. Isometric holds build quadriceps strength and often reduce pain during the hold itself. 3 to 5 repetitions.

4. Step-up

Use a low step, 10 to 15cm to begin. Step up leading with the painful leg, step down leading with the other. Going slowly on the way down is where the strength is built. 2 sets of 8 per leg.

5. Side-lying hip abduction

Lie on your side and lift the top leg about 30cm, keeping it straight and slightly behind you. Weak hip muscles let the knee drift inwards on every step, which concentrates load on one side of the joint. 2 sets of 12 per side.

6. Standing hamstring curl

Hold a chair, bend one knee to bring the heel towards your bottom, lower slowly. The four-arm trial data is the reason this one is not optional. 2 sets of 10 per leg.

7. Stationary cycling

Low resistance, saddle set high enough that your knee does not bend past about 90 degrees at the top of the pedal stroke. Start at 10 minutes and build towards 20 to 30 minutes most days. This is the aerobic component the Harvard analysis singled out.

A warming balm will not rebuild cartilage, and it should not be sold to you as though it could. What it does well is make the first few minutes of movement tolerable, which is often the difference between finishing a session and abandoning the routine in week two. Here is how to get the most out of Organic Hemp Horse Salve Extra Strong.

1. Apply 10 to 15 minutes before you train, not after. The warming effect builds gradually. Applying it beforehand means the stiffest part of your first set is already easier.
2. Use a small amount, roughly a hazelnut for one knee. These formulas are concentrated. More product does not mean more effect, it just means a longer wait for it to absorb.
3. Massage for a full 2 minutes, in circles around the kneecap and along the sides of the joint. The massage itself contributes as much as the balm by increasing local blood flow. Do not press hard on the kneecap.
4. Cover the surrounding muscle, not just the sore spot. Work 10cm up into the lower quadriceps and down into the calf. Those muscles are part of the problem and part of the solution.
5. Wash your hands properly afterwards. Warming botanicals transfer easily to eyes and other sensitive areas, and that is an unpleasant lesson to learn once.
6. Repeat in the evening on training days. Post-session stiffness usually peaks a few hours later. A second application before bed keeps the knee from setting up overnight.
7. Give it three weeks before judging it. The 18 organic plant extracts, arnica among them, are traditionally used for exactly this purpose, and the perceived benefit tends to build with consistent use rather than arriving on day one.

If you prefer a lighter texture that absorbs faster, or you want something for a flare rather than for daily use before training, Rapid Hemp Devil's Claw Pain Gel is the gel format of the same idea, with devil's claw, arnica, comfrey and frankincense.

Most exercise programmes for knee osteoarthritis fail for predictable reasons, and none of them are about willpower.

Stopping the moment it feels better. This is the big one. Pain improves before strength does, so people quit at week four with half the adaptation banked. Muscle needs 8 to 12 weeks of consistent loading. Treat the routine as permanent, not as a course of treatment.

Going too deep too soon. Deep squats, deep lunges and leg press to full flexion put high compressive load through the worn part of the joint. Keep knee bend under about 60 degrees for the first month, then progress if the knee stays quiet.

Training only the quadriceps. The four-arm trial showed that quadriceps plus hamstrings beat quadriceps alone, and the imaging study points to the ratio between the two mattering. Skipping hamstring and hip work leaves benefit on the table.

Treating any pain as damage. Mild discomfort during exercise is expected and is not a sign that the joint is wearing faster. The practical rule is to keep pain under roughly 5 out of 10 during the session and to be back at your normal baseline within 24 hours. If you are not, the load was too high, not the exercise wrong.

Resting during a flare instead of reducing. Complete rest for a week undoes weeks of adaptation. During a flare, drop to straight leg raises and gentle cycling rather than stopping entirely.

Ignoring the aerobic half. Strength work alone misses the cardiovascular and weight-management benefit that walking, cycling or swimming provides, and body weight is one of the largest modifiable factors in knee load.

⚠️ Important Note

Sharp, stabbing or locking knee pain is not normal training discomfort. If your knee gives way, swells after every session, or wakes you at night, stop and see a doctor or physiotherapist before continuing. Topical products support comfort and circulation, they do not treat joint disease.

✅ Key Takeaways

• Exercise is the only part of knee osteoarthritis care that changes joint mechanics, and 139 trials back it up
• Train quadriceps and hamstrings together, add walking or cycling, and keep knee bend shallow for the first month
• Give the programme 8 to 12 weeks, and use a warming balm before sessions so stiffness does not end the routine early

Knee osteoarthritis responds to work, not to rest. The strongest evidence we have points in one direction: build the quadriceps and hamstrings, add low-impact aerobic exercise you will actually keep doing, and give it three months before you judge the result.

Comfort measures earn their place by making the work possible. Warming your knee before a session with Organic Hemp Horse Salve Extra Strong, or reaching for Rapid Hemp Devil's Claw Pain Gel when a flare makes the first steps of the day difficult, is not a substitute for the seven moves above. It is what stops the stiffness from talking you out of them.

Start with three exercises tomorrow. Do them on alternate days. Add the rest when they feel easy. That is the whole plan, and it is more than most people with an arthritic knee ever do.

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📚 Sources & References

1. Cochrane Database of Systematic Reviews (2024) · Exercise for osteoarthritis of the knee, 139 trials and 12,468 participants
2. Radiological Society of North America · Thigh muscle volume and the odds of total knee replacement
3. Mayo Clinic · Osteoarthritis diagnosis and treatment, including exercise guidance
4. PubMed Central (PMC10379804) · Randomised four-arm trial of muscle strengthening in knee osteoarthritis
5. Harvard Health Publishing · Network analysis of 217 trials on exercise modality in knee osteoarthritis