Physiotherapy exercises for knee pain strengthen the muscles that support the knee joint, restore range of motion, and reduce stiffness so that everyday activities like walking, climbing stairs, and standing up from a chair become easier and less painful. Physiotherapy is the most evidence-supported non-surgical treatment for knee pain, and targeted exercise is the foundation of every physiotherapy programme for the knee. Approximately 3.9 million Canadians aged 20 and older live with diagnosed osteoarthritis according to the Public Health Agency of Canada, and the knee is the most commonly affected joint. This article covers what a physiotherapist does for knee pain, the single best exercise to start with, a full home exercise programme with step-by-step instructions, the biggest mistakes that make knee pain worse, and when you should see a professional instead of exercising on your own.

What Will a Physiotherapist Do for Knee Pain?

A physiotherapist will assess the root cause of your knee pain, identify which structures are contributing to the problem, and build a treatment plan that combines hands-on manual therapy with a progressive exercise programme. The first session is a comprehensive assessment that includes a medical history review, gait analysis, range of motion testing, strength testing, and palpation of the knee joint, surrounding muscles, and ligaments.

Based on the assessment findings, the physiotherapist determines whether the pain originates from the joint itself (osteoarthritis, meniscus injury, ligament strain), the muscles and tendons around the knee (patellofemoral pain, IT band syndrome, patellar tendinopathy), or a biomechanical issue higher up in the chain (hip weakness, foot overpronation, core instability). The treatment plan addresses the specific cause, not just the symptom. A 2024 randomised controlled trial published in Frontiers in Physiology found that active multimodal physiotherapy, combining exercise with manual therapy and pain neuroscience education, produced substantial pain relief sustained at 12 months in patients with chronic knee pain.

Treatment typically includes manual therapy (joint mobilization, soft tissue release), therapeutic exercise (strengthening, stretching, balance training), modalities where needed (ultrasound, electrical stimulation, laser therapy), and a home exercise programme you follow between sessions. Most patients attend physiotherapy 1 to 2 times per week for 6 to 12 weeks, depending on the severity and duration of the condition.

What Is the Single Best Exercise for Knee Pain?

The single best exercise for knee pain is the straight leg raise. The straight leg raise strengthens the quadriceps, the large muscle group on the front of the thigh, without bending the knee joint, which makes it safe for nearly every type of knee condition including osteoarthritis, patellofemoral pain, and post-surgical recovery. Weak quadriceps are one of the most common contributors to knee pain because the quadriceps absorb shock and stabilize the kneecap during every step, squat, and stair climb. When the quadriceps are weak, the knee joint absorbs more force than it should, which accelerates wear and increases pain.

To perform a straight leg raise: lie on your back with one knee bent and the other leg straight. Tighten the quadriceps of the straight leg, then slowly lift the straight leg to the height of the bent knee, keeping the knee fully extended. Hold at the top for 3 to 5 seconds, then lower slowly. Perform 10 to 15 repetitions for 2 to 3 sets. Switch sides if both knees are affected. This exercise is the starting point for nearly every physiotherapy knee programme because it builds the baseline quadriceps strength that all other exercises depend on.

Physiotherapy Exercises You Can Do at Home for Knee Pain

The following exercise rehabilitation programme targets the four muscle groups that matter most for knee health: the quadriceps (front of the thigh), hamstrings (back of the thigh), glutes (buttocks), and calves. Weakness in any of these groups shifts excess load onto the knee joint. Strengthening all four creates a balanced support system that protects the knee during movement.

1. Quad sets: Sit on the floor with your legs straight in front of you. Tighten the quadriceps by pressing the back of your knee flat against the floor. Hold the contraction for 5 seconds, then release. Perform 10 to 15 repetitions for 2 to 3 sets. This is the gentlest starting point for patients with acute knee pain.
2. Straight leg raises: Lie on your back with one knee bent and the other leg straight. Tighten the quadriceps of the straight leg, lift it to the height of the bent knee, hold for 3 to 5 seconds, then lower slowly. Perform 10 to 15 repetitions for 2 to 3 sets per side.
3. Hamstring curls: Stand behind a chair and hold the back for balance. Slowly bend one knee, bringing the heel toward the buttock. Hold for 3 seconds at the top, then lower slowly. Perform 10 to 15 repetitions for 2 to 3 sets per side. Hamstring strength supports the knee from the back and controls how the joint bends under load.
4. Wall squats: Stand with your back flat against a wall and your feet shoulder-width apart, about 30 centimetres from the wall. Slowly slide down the wall until your knees reach a 45-degree bend (do not go deeper than 90 degrees). Hold for 5 to 10 seconds, then slide back up. Perform 8 to 12 repetitions for 2 to 3 sets. Wall squats strengthen the quadriceps, glutes, and hamstrings simultaneously.
5. Step-ups: Stand in front of a low step (15 to 20 centimetres high). Step up with the affected leg, straighten the knee fully at the top, then step back down slowly. Perform 10 to 12 repetitions for 2 sets per side. Step-ups build functional strength for stair climbing and getting in and out of a car.
6. Calf raises: Stand with your feet hip-width apart, holding a wall or chair for balance. Rise onto the balls of your feet, hold for 2 to 3 seconds, then lower slowly. Perform 12 to 15 repetitions for 2 to 3 sets. Calf strength supports the ankle and reduces compensatory stress on the knee.
7. Seated knee extension: Sit in a chair with your feet flat on the floor. Slowly straighten one knee until the leg is fully extended in front of you. Hold for 3 to 5 seconds, then lower slowly. Perform 10 to 12 repetitions for 2 to 3 sets per side. Add a light ankle weight as you get stronger.
8. Heel slides: Lie on your back with both legs straight. Slowly slide one heel toward your buttock, bending the knee as far as comfortable. Hold for 2 to 3 seconds, then slide back to the starting position. Perform 10 to 15 repetitions per side. Heel slides restore range of motion in a controlled, low-load position.

Perform these exercises 3 to 5 times per week. Start with the gentlest exercises (quad sets, straight leg raises, heel slides) and progress to the more demanding ones (wall squats, step-ups) as your strength improves. A meta-analysis published in BMC Sports Science, Medicine and Rehabilitation (2025) found that strengthening exercises produced an average pain reduction of 1.44 points on standard pain scales within 4 to 6 weeks for patients with patellofemoral knee pain.

Exercise	Primary Muscle	Difficulty	Best For
Quad sets	Quadriceps	Beginner	Acute pain, post-surgical, starting point
Straight leg raises	Quadriceps, hip flexors	Beginner	All knee conditions, early rehab
Hamstring curls	Hamstrings	Beginner	Knee stability, ligament support
Wall squats	Quadriceps, glutes, hamstrings	Intermediate	Functional strength, arthritis
Step-ups	Quadriceps, glutes	Intermediate	Stair climbing, functional return
Calf raises	Gastrocnemius, soleus	Beginner	Ankle stability, gait improvement
Seated knee extension	Quadriceps	Beginner to intermediate	Quad isolation, progressive loading
Heel slides	Hamstrings, quadriceps	Beginner	Range of motion, post-surgical

Sources: Versus Arthritis UK; NHS Inform Scotland; Healthline; Frontiers in Physiology, 2024; BMC Sports Science, Medicine and Rehabilitation, 2025.

What Is the Fastest Way to Relieve Knee Pain from Exercise?

The fastest way to relieve knee pain from exercise is to apply the RICE protocol (rest, ice, compression, elevation) immediately after the pain appears, then transition to gentle range-of-motion exercises within 24 to 48 hours. Ice the knee for 15 to 20 minutes every 2 to 3 hours during the first 48 hours to reduce swelling. Compress the joint with an elastic bandage to control inflammation, and elevate the leg above heart level to encourage fluid drainage.

After the initial 48-hour period, gentle movement becomes more important than rest. Prolonged immobilization weakens the muscles around the knee and stiffens the joint, which makes the pain worse in the long run. Begin with the gentlest exercises from the home programme (quad sets, heel slides, and gentle hamstring stretches) and progress gradually as pain allows. Acupuncture can also provide rapid pain relief alongside exercise by targeting pain pathways through a different mechanism than stretching and strengthening.

What Is the Number One Mistake That Makes Knees Worse?

The number one mistake that makes knees worse is avoiding movement entirely. Complete rest feels logical when the knee hurts, but prolonged inactivity causes the quadriceps and hamstrings to weaken rapidly, which removes the muscular support that protects the knee joint and leads to increased pain and stiffness over time. Research consistently shows that controlled exercise is more effective than rest for nearly every type of knee pain, including osteoarthritis, patellofemoral pain, and post-surgical recovery.

The key distinction is between harmful movement and therapeutic movement. Running through sharp knee pain, doing deep squats with heavy weight, or returning to high-impact sport too early are harmful. Controlled exercises like quad sets, straight leg raises, and gentle range-of-motion work are therapeutic. Chiropractic care can complement exercise by addressing joint alignment issues in the knee, hip, and lower back that contribute to abnormal loading patterns on the knee.

Statistics Canada data shows that 29% of Canadian osteoarthritis patients report knee pain as their primary symptom, making the knee the most commonly affected joint. The Public Health Agency of Canada reports that 219,000 Canadians are newly diagnosed with osteoarthritis each year, and therapeutic exercise is recommended as the first-line treatment by every major clinical guideline including the Osteoarthritis Research Society International (OARSI) and the American College of Rheumatology (ACR).

What Exercises Should You Avoid with Knee Pain?

The exercises you should avoid with knee pain are movements that place excessive compressive or shearing force on the knee joint. Deep squats below 90 degrees, lunges with the front knee extending past the toes, heavy leg press with a full range of motion, plyometric jumps, and running on hard surfaces all increase the load on an already irritated joint. Full-depth leg extensions on a machine with heavy weight are particularly problematic because they isolate the quadriceps in a way that maximizes patellar compression force.

Avoid high-impact activities like running, basketball, and tennis until the pain resolves and you have rebuilt baseline strength through the low-impact exercises in your rehabilitation programme. Swimming, cycling, and elliptical training are excellent alternatives that maintain cardiovascular fitness without loading the knee with impact forces. Massage therapy can help manage muscle tension in the quadriceps, hamstrings, and IT band that develops from compensatory movement patterns during knee pain episodes.

Does Physiotherapy Help Arthritis Knee Pain?

Yes, physiotherapy helps arthritis knee pain. Therapeutic exercise is the single most recommended non-pharmacological treatment for knee osteoarthritis across every major clinical guideline worldwide, including those from the Osteoarthritis Research Society International (OARSI), the American College of Rheumatology (ACR), and the European Alliance of Associations for Rheumatology (EULAR).

Osteoarthritis involves the gradual breakdown of cartilage within the knee joint, which reduces the cushioning between the femur (thigh bone) and the tibia (shin bone). Exercise does not reverse cartilage loss, but it strengthens the muscles that absorb shock and stabilize the joint, which reduces the mechanical load on the damaged cartilage and decreases pain. An umbrella review of 116 systematic reviews published in Frontiers in Pain Research (2026) confirmed that therapeutic exercise significantly reduces pain-related outcomes in knee osteoarthritis patients.

In Canada, approximately 12% of adults aged 20 and older had diagnosed osteoarthritis in 2021-2022, according to the Canadian Chronic Disease Surveillance System. Women are affected more than men (16.1% vs. 11.1%), and obesity increases knee osteoarthritis risk 4.37 times according to a population study published in BMC Public Health. Class IV laser therapy and manual joint mobilization can be added to the exercise programme for osteoarthritis patients who need additional pain management to participate comfortably in their rehabilitation exercises.

When Should You See a Physiotherapist for Knee Pain?

You should see a physiotherapist for knee pain when home exercises alone are not producing improvement after 2 to 3 weeks of consistent effort, or when the pain is accompanied by symptoms that suggest a condition requiring professional assessment. See a physiotherapist promptly if your knee pain is accompanied by any of the following:

• Swelling that does not subside within 48 hours or keeps returning
• A feeling that the knee is locking, catching, or giving way during movement
• Inability to fully straighten or fully bend the knee
• Sharp pain during weight-bearing that prevents normal walking
• Knee pain that wakes you from sleep
• Visible deformity, redness, or warmth around the joint
• Knee pain following a direct injury (fall, twist, or impact)
• Pain that has persisted for more than 4 weeks without improvement

These symptoms may indicate a meniscus tear, ligament injury, significant cartilage damage, or inflammatory arthritis, all of which require a professional assessment to guide treatment safely. A physiotherapist can diagnose the condition, determine whether imaging is needed, and build a treatment plan that addresses the specific cause. Patients with foot and ankle biomechanical issues contributing to knee pain may also benefit from custom orthotics as part of their rehabilitation plan.

What Sleeping Position Is Best for Knee Pain?

The best sleeping position for knee pain depends on which position you naturally prefer. For side sleepers, placing a pillow between the knees keeps the hips and knees aligned and prevents the top knee from dropping inward, which can stress the inner knee ligaments and irritate the joint. For back sleepers, placing a pillow under the knees slightly bends the joint and takes pressure off the kneecap and the structures at the back of the knee. Both positions reduce mechanical stress on the knee joint during the 6 to 8 hours of sleep.

Avoid sleeping with the knees fully bent in a tight fetal position, as this compresses the joint surfaces and can increase stiffness by morning. Here in Markham, we often advise patients to combine a supportive sleeping position with gentle range-of-motion exercises before bed to reduce the morning stiffness that is common with knee osteoarthritis and patellofemoral pain.

Frequently Asked Questions

How Long Does Physiotherapy Take for Knee Pain?

Physiotherapy for knee pain typically takes 6 to 12 weeks of consistent treatment for mild to moderate conditions. Acute injuries like a minor ligament sprain may resolve in 4 to 6 weeks. Chronic conditions like osteoarthritis often benefit from an initial 8 to 12 week programme followed by a long-term maintenance exercise routine. The Deloitte report for the Canadian Physiotherapy Association found that expanding physiotherapy access could produce $144 million in savings across osteoarthritis, back pain, and coronary heart disease alone.

Can I Do Physiotherapy Exercises at Home?

Yes, you can do physiotherapy exercises at home, and the home exercise programme is a critical part of every physiotherapy treatment plan. The exercises listed in this article are safe for most people with general knee pain. However, getting a professional assessment first is important to confirm the cause of your pain and receive a programme tailored to your specific condition, because some exercises that help one type of knee pain can worsen another.

How Often Should I Do Knee Exercises?

You should do knee exercises 3 to 5 times per week for the best results. Daily exercise is ideal for gentle movements like quad sets and hamstring stretches. More demanding exercises like wall squats and step-ups are best performed every other day to allow recovery time. Consistency is the single biggest predictor of improvement; performing exercises 3 times per week consistently produces better results than performing them intensely for one week then skipping the next.

Is Walking Good for Knee Pain?

Yes, walking is good for most types of knee pain when done in supportive footwear on a flat surface. Walking promotes blood flow to the joint, maintains range of motion, and strengthens the muscles around the knee through a natural weight-bearing movement. Start with short distances at a comfortable pace and gradually increase as pain allows. Avoid walking through sharp or worsening pain, and switch to a non-impact activity like swimming or cycling on days when the knee is particularly irritated.

Do Custom Orthotics Help Knee Pain?

Custom orthotics can help knee pain when the pain is caused or worsened by a foot or ankle biomechanical issue. Flat feet (overpronation) alter the alignment of the lower leg and increase rotational stress on the knee joint. Custom orthotics correct that alignment from the ground up, reducing the abnormal forces that contribute to knee pain. A physiotherapist or chiropractor can assess whether orthotics are appropriate for your specific condition.

How to Rehab Your Own Knee?

To rehab your own knee, start with the gentlest exercises (quad sets, heel slides, and straight leg raises) and perform them daily. Progress to intermediate exercises (hamstring curls, wall squats, calf raises) after 1 to 2 weeks of pain-free practice with the beginner exercises. Add functional exercises (step-ups, seated knee extensions with light weight) once your strength allows. Combine the exercise programme with icing after activity, supportive footwear, and gradual return to your normal activities. If pain does not improve within 2 to 3 weeks or worsens at any point, see a physiotherapist for a professional assessment.

The Takeaway

Physiotherapy exercise is the most effective non-surgical treatment for knee pain because it addresses the root cause, whether that is muscle weakness, joint stiffness, or biomechanical dysfunction, rather than masking the symptom with medication alone. The exercises in this article target the four muscle groups that matter most for knee health: the quadriceps, hamstrings, glutes, and calves. Starting with gentle movements and progressing gradually gives the joint time to adapt while building the strength and stability that protect it long term.

At KC Rehab, our physiotherapists assess the specific cause of your knee pain and build a treatment plan that combines hands-on manual therapy with a progressive exercise programme tailored to your goals. Call us at 905-205-1668 to book your initial assessment.