Physiotherapy exercises for knee osteoarthritis include quad sets, straight-leg raises, sit-to-stands, step-ups, hip and glute strengthening, and low-impact cardio, all of which strengthen the muscles around the knee to ease pain and stiffness. These exercises work because stronger muscles take load off the worn joint. The right mix and progression depend on your knee, so it is best to get assessed before you begin. Below we cover the best exercises, why they work, how often to do them, what to avoid, and how exercise can help you delay or avoid surgery, all backed by research.

What Are the Best Physiotherapy Exercises for Knee Osteoarthritis?

The best physiotherapy exercises for knee osteoarthritis are strengthening exercises for the quadriceps and hips, gentle range-of-motion movements, and low-impact cardio like walking or cycling. Strengthening builds the muscle support that protects the joint, range-of-motion work keeps the knee mobile, and low-impact cardio improves fitness without pounding the joint. Together these three types form the foundation of every good knee osteoarthritis program.

Knee osteoarthritis is common, which is why this matters to so many people. The global prevalence of knee osteoarthritis is about 16% in people aged 15 and over, rising to roughly 22.9% in those aged 40 and over, according to a 2020 meta-analysis of 88 studies published in eClinicalMedicine. A network meta-analysis of 103 trials with 9,134 participants found exercise effective for pain and function in knee and hip osteoarthritis, published in Sports Medicine. Exercise is not a minor add-on for knee osteoarthritis. Exercise is the foundation of care.

The core physiotherapy exercises for knee osteoarthritis include:

• Quadriceps strengthening, such as quad sets and straight-leg raises
• Hip and glute strengthening to support the knee from above
• Functional movements like sit-to-stands and step-ups
• Gentle range-of-motion work to reduce stiffness
• Low-impact cardio like walking, cycling, or water exercise

Every one of these should be matched to your stage and comfort, which is where a proper physiotherapy assessment comes in. Before we get to the specific exercises, it helps to confirm whether physiotherapy actually works for an arthritic knee.

Can Physiotherapy Help Osteoarthritis in the Knee?

Yes, physiotherapy can help osteoarthritis in the knee, and it is one of the most effective non-drug treatments available. Physiotherapy helps by strengthening the muscles around the joint, improving how the knee moves, and teaching you how to stay active without flaring the pain. This is why physiotherapy treatment sits at the top of clinical guidelines.

The evidence is strong and consistent. The 2019 American College of Rheumatology and Arthritis Foundation guideline strongly recommends exercise for knee osteoarthritis. Exercise also carries far less risk than long-term medication, since one analysis reported adverse events in 29.8% of people using anti-inflammatory drugs, while exercise therapy is considered safe and low-risk. For patients here in Markham, that safety profile is a big reason we start with movement rather than medication. Physiotherapy for knee osteoarthritis works, and understanding why it works makes the exercises easier to commit to.

How Does Exercise Help Knee Osteoarthritis?

Exercise helps knee osteoarthritis by strengthening the muscles that support the joint, which takes pressure off the worn cartilage and reduces pain. Strong muscles act like shock absorbers for the knee, so the joint carries less load with every step. Weak muscles do the opposite, and reduced quadriceps strength relative to body weight is a recognized risk factor for knee osteoarthritis, according to research cited in eClinicalMedicine.

Movement also feeds the joint itself. The knee has no direct blood supply to its cartilage, so it relies on movement to circulate the synovial fluid that delivers nutrients and lubrication. Gentle, regular motion keeps that fluid moving, which is one reason a stiff knee often feels better once it warms up. Stronger muscles plus better-nourished cartilage add up to less pain and easier daily movement, and the same principle applies to other issues like knee pain behind the joint. The most important of those muscles to train is the quadriceps.

What Are the Best Strengthening Exercises for Knee Osteoarthritis?

The best strengthening exercises for knee osteoarthritis are quad sets, straight-leg raises, sit-to-stands, step-ups, and hip strengthening, all of which build the muscles that support the knee. These moves are gentle, need no equipment, and can be scaled up or down. A typical starting sequence looks like this:

1. Quad sets: sit with your leg straight, tighten your thigh muscle, hold for about 5 seconds, then relax. Repeat 10 times.
2. Straight-leg raises: lying down with one knee bent, keep the other leg straight, tighten the thigh, and lift the leg a short way. Hold, then lower slowly.
3. Sit-to-stands: from a sturdy chair, stand up and sit down slowly without using your hands. Keep the movement controlled.
4. Step-ups: step onto the bottom stair with one foot, bring the other up, then step down slowly. Hold a rail for balance.
5. Hip and glute work, such as a seated hip march, to support the knee from above.

Start with one set and build toward two or three as you get stronger, holding each contraction gently rather than forcing it. Higher-frequency strengthening, five or more sessions per week, showed superior pain relief compared with lower-frequency programs in a 2025 network meta-analysis published in Frontiers. Building strength steadily is the goal, and progressing through these moves is the heart of exercise rehabilitation. A common worry when starting is whether it is normal for these exercises to hurt.

Is It Normal to Have Pain During Knee Osteoarthritis Exercises?

Yes, some mild pain during knee osteoarthritis exercises is normal, but sharp or worsening pain is not. Mild muscle soreness or a low-level ache that settles within a day is acceptable and often expected when you start. Sharp, stabbing pain, or pain that lingers and builds over several days, is a signal to ease off and check your technique. A simple guide is that discomfort up to a mild level is fine, while pain past that means stop and reassess.

Does Walking Make Knee Osteoarthritis Worse?

No, walking does not make knee osteoarthritis worse for most people, and it is one of the best low-impact exercises for the condition. Walking strengthens the leg muscles, keeps the joint moving, and improves fitness without the pounding of running. It only tends to aggravate the knee when you do too much too soon, so the key is to start short and build gradually.

Low-impact cardio delivers real, measurable benefit. Overweight and obese patients with knee osteoarthritis who exercised walked significantly farther in a six-minute test and reported less pain than those who did not, according to a 2022 systematic review published in IJERPH. Beyond walking, cycling, swimming, and water exercise are all gentle on the knee because they reduce the load the joint carries. Walking and low-impact cardio help rather than harm, which raises a related question many people ask: whether it is better to rest the knee or move it.

Is It Better to Rest or Exercise an Arthritic Knee?

It is better to exercise an arthritic knee than to rest it, as long as the exercise is appropriate and controlled. Rest may feel right during a bad flare, but too much rest weakens the muscles that support the joint, which makes the pain worse over time. Movement keeps the muscles strong and the joint nourished, so gentle activity beats prolonged rest for almost everyone with knee osteoarthritis.

The balance is short rest during an acute flare, then a return to gentle movement as soon as you can. A day or two of easing off is fine, but weeks of inactivity sets back your strength and mobility. This measured, active approach is central to how physiotherapy works. Choosing movement over rest is the right call, and choosing it wisely means knowing which activities to avoid.

What Should You Not Do With Osteoarthritis of the Knee?

What you should not do with osteoarthritis of the knee is push into sharp pain, stay completely inactive, or jump into high-impact activity without building up first. These habits either overload the joint or let the supporting muscles waste away. Protecting your knee means steering around them while staying active.

Habits to avoid with knee osteoarthritis include:

• Working through sharp or worsening pain instead of easing off
• Long periods of complete rest that weaken the surrounding muscles
• Sudden high-impact activity like running or jumping without preparation
• Deep, heavily loaded squats or lunges that push the knee past comfort
• Ignoring a knee that swells or stays painful for days after activity

Avoiding these keeps your progress on track between sessions. Steering clear of harmful habits also means understanding what tends to set the knee off in the first place.

What Flares Up Knee Osteoarthritis?

Knee osteoarthritis flares up from overdoing activity, sudden increases in load, extra body weight, and sometimes cold or damp weather. A flare is a temporary spike in pain and swelling, usually triggered by asking the joint to do more than it is ready for. Knowing your triggers lets you pace yourself and avoid the boom-and-bust cycle of overdoing it then crashing.

Body weight is one of the most controllable triggers. People classified as obese are up to four times as likely to develop knee osteoarthritis, according to the NHS Ayrshire & Arran MSK service, and extra weight also loads an already sore joint with every step. Managing activity levels, pacing new exercise, and keeping a healthy weight all reduce flares. When a flare brings stubborn inflammation, treatments like laser therapy can calm the joint while you rebuild. Reducing flares connects directly to the bigger goal of slowing the condition down.

How Can I Stop My Knee Osteoarthritis From Progressing?

You can slow your knee osteoarthritis from progressing by staying active, strengthening the muscles around the knee, managing your weight, and pacing your activity. While osteoarthritis cannot be fully reversed, its progression and its symptoms can be strongly influenced by how you manage it. Strong muscles, a healthy weight, and regular movement are the most powerful tools you have.

Weight management matters because every extra kilogram multiplies the load through the knee when you walk or climb stairs. Combined with strengthening, keeping your weight in a healthy range protects the joint over the long term. A physiotherapist can build a plan that layers strengthening, low-impact cardio, and pacing, and can bring in tools like custom orthotics when foot mechanics are adding to the load. Slowing progression naturally leads to the question on many patients’ minds: whether all this can help them avoid surgery.

Can Exercise Help You Avoid Knee Replacement Surgery?

Yes, exercise can help many people delay or avoid knee replacement surgery by reducing pain and improving function enough that surgery is no longer needed. Exercise builds the strength and mobility that let people manage well without an operation, which is why conservative care is tried first. For a large share of patients, that conservative approach works.

The evidence is striking. In a cohort of 55,059 people, those who became unwilling to have surgery after a 3-month education and exercise program had a 20% lower chance of actually undergoing joint replacement, according to a 2025 study in PLOS Medicine using the Swedish Osteoarthritis Register. That matters because an estimated 54% of knee osteoarthritis patients will receive a total knee replacement over their lifetime under current guidelines, per a U.S. health-claims analysis. Surgery is sometimes necessary and genuinely helps advanced cases, and when it is needed our team also supports post-surgical recovery.

For many people, a strong program guided by our physiotherapists delays or removes the need for surgery entirely. We see this often with knee patients across Markham.

Exercise is one of many things physiotherapy can help with for an arthritic knee. Getting the most from that program comes down to how often you do it.

How Often Should You Exercise With Knee Osteoarthritis?

You should exercise with knee osteoarthritis most days of the week, aiming for a short daily routine of strengthening and movement plus regular low-impact cardio. Consistency matters more than intensity, so a little every day beats a hard session once a week. Strengthening exercises can be done daily or every other day, while low-impact cardio like walking fits well most days.

Frequency drives results. Higher-frequency strengthening of five or more sessions per week produced better pain relief than lower-frequency programs in a 2025 network meta-analysis. A realistic target is a 10 to 15 minute strengthening routine most days, paired with a daily walk that you build up gradually. Knowing how often to exercise sets up a clear picture of how the different exercise types fit together.

Exercise Types for Knee Osteoarthritis at a Glance

The main exercise types for knee osteoarthritis are strengthening, low-impact cardio, range-of-motion, and balance work, each serving a different purpose. The table compares them.

Exercise Type	What It Does	Examples	What It Helps
Strengthening	Builds muscle support that offloads the joint	Quad sets, straight-leg raises, sit-to-stands, step-ups	Pain, joint stability, daily function
Low-impact cardio	Improves fitness and mobility without pounding the knee	Walking, cycling, swimming, water exercise	Pain, fitness, weight management
Range-of-motion	Keeps the knee moving and reduces stiffness	Gentle knee bends, heel slides, seated leg stretches	Stiffness, flexibility
Balance	Improves control and lowers fall risk	Single-leg stand, controlled step work	Stability, confidence, safety

Sources: Relative Efficacy of Different Exercises for Knee and Hip Osteoarthritis, Sports Medicine (2019); Efficacy of Strengthening or Aerobic Exercise on Pain Relief, Clinical Rehabilitation (2013); ACR/Arthritis Foundation Guideline (2019).

Frequently Asked Questions

What Are the Four Stages of Knee Osteoarthritis?

The four stages of knee osteoarthritis are minor, mild, moderate, and severe, based on how much cartilage has worn and how much the joint space has narrowed. Early stages often cause little pain, while later stages bring more stiffness, swelling, and difficulty moving. Exercise helps at every stage, though the plan is adjusted as the condition changes.

Can I Reverse Osteoarthritis in My Knees?

You cannot fully reverse osteoarthritis in your knees, because the cartilage that has worn away does not grow back, but you can strongly improve pain and function. Strengthening, weight management, and regular movement can reduce symptoms so much that many people feel close to normal. Hands-on care such as chiropractic care can complement your exercise plan when joint stiffness is a factor. The goal is managing and slowing the condition rather than curing it.

How Do You Lubricate Knee Joints Naturally?

You lubricate your knee joints naturally through movement, which circulates the synovial fluid that nourishes and cushions the joint. Gentle, regular activity like walking and range-of-motion exercise keeps this fluid moving, which is why a stiff knee often loosens once you get going. Staying active is the most reliable way to keep the joint moving smoothly.

What Is the Best Single Exercise for Knee Osteoarthritis?

The best single exercise for knee osteoarthritis is the straight-leg raise, because it strengthens the quadriceps without bending or loading the painful joint. Strong quadriceps take pressure off the knee, and this move builds them safely for almost everyone. That said, a mix of exercises works better than any one on its own.

Can Physiotherapy Cure Knee Osteoarthritis?

Physiotherapy cannot cure knee osteoarthritis, but it can control the symptoms and improve function so effectively that many people live comfortably and stay active. Physiotherapy treats the muscle weakness and movement problems that drive the pain, and pairing it with massage therapy can ease the surrounding muscle tension. Combined with weight management and pacing, it is one of the most effective ways to manage the condition long term.

Putting It All Together for Your Knees

Physiotherapy exercises for knee osteoarthritis work by strengthening the muscles around the knee, keeping the joint moving, and reducing the load it carries, which eases pain and helps you stay active. Backed by research from sources like the American College of Rheumatology and large studies in Sports Medicine and PLOS Medicine, exercise is the first and most effective line of care, and for many people it delays or removes the need for surgery. The right program is the one built around your knee, your stage, and your goals.

If knee pain or stiffness has been slowing you down, an assessment is a smart place to start. Our team at KC Rehab would be glad to build a knee program around your goals, or you can reach us anytime at 905-205-1668 with a question first.