Achy knees often aren’t about damage at all. The cause can be weak muscles, poor movement, or too much sitting. The good news? You can fix a lot of that at home. Here are six knee strengthening exercises that genuinely help with pain, who each one suits, and how to do them safely. Incorporating knee strengthening exercises into your routine can provide significant benefits.

1. Straight Leg Raises , Gentle Quad Activation

Straight leg raises wake up the quadriceps without bending the knee. That makes them one of the safest knee strengthening exercises for sore or stiff joints.

These knee strengthening exercises are perfect for enhancing muscle function around the joint.

They’re best for anyone in early recovery, people with arthritis, or anyone whose knee hurts when they squat. You stay flat on your back, so there’s almost no load through the joint itself.

Incorporating knee strengthening exercises can also aid in injury prevention.

Here’s how to do one. Lie on your back with one leg straight and the other bent, foot flat on the floor. Tighten the thigh of the straight leg, then lift it about 15cm off the floor. Hold for 3 to 5 seconds, then lower slowly. Aim for 10 reps on each side.

The lift comes from the thigh, not the hip. If you feel it in your hip flexor or lower back, you’re swinging the leg instead of squeezing the muscle. Slow it down. A small towel rolled under the knee can help you feel the right squeeze. For a guided run-through, the team at Laurens Holve Healthcare’s knee exercise videos demonstrate the proper form.

One caveat. If your back complains during the hold, drop the lift height. The point is a controlled squeeze, not how high your foot goes.

2. Wall Sits , Building Endurance Around the Joint

Wall sits build staying power in the quads and glutes by holding one position. They train the muscles that keep your knee stable when you stand or walk for long stretches.

They suit people who can already bend the knee comfortably and want more endurance. If a full squat hurts, a wall sit lets you control the depth and stop before pain starts.

The effectiveness of knee strengthening exercises increases with consistency.

To do one, stand with your back against a wall and walk your feet out about half a metre. Slide down until your knees are bent, but never past a right angle. Keep your knees in line with your toes and hold for 20 to 30 seconds. Build the time as you get stronger.

Wall sits keep your spine supported the whole time, which is why many people with knee pain find them easier than free squats. Start shallow. A 90-degree bend puts the most load through the kneecap, so a higher hold is often kinder when you’re starting out.

The honest limit here is that a long static hold can spike pressure behind the kneecap for some people. If you feel a sharp ache under the cap, come up higher or cut the hold shorter. Pain during the exercise is a signal, not a badge.

3. Step-Ups , Functional Strength for Everyday Movement

Step-ups copy a movement you do every day: climbing stairs. They strengthen the quads, glutes and the muscles that control how your knee tracks when you load it on one leg.

They’re a good pick once gentler moves feel easy and you want strength that carries over to real life. Stairs, kerbs, getting out of a low chair. All of it gets easier.

Use a low step or the bottom stair. Place one whole foot on the step, push through that heel, and bring the other foot up to meet it. Step back down with control. Do 8 to 10 reps, then switch legs. Hold a rail or wall for balance.

Gradually increasing the intensity of knee strengthening exercises will yield better results.

Watch the knee on the way down. If it caves inward, drop to a lower step and slow the lowering phase. That inward collapse is where a lot of knee pain hides, and controlling it is half the benefit.

4. Hamstring Curls , Balancing the Back of the Knee

Hamstring curls work the muscles at the back of the thigh, which control how your knee bends and protect the joint from the front. Strong hamstrings balance out strong quads, and that balance matters for knee health.

They suit anyone who’s worked hard on quad strength but ignored the back of the leg. An imbalance here can pull on the joint and add stress over time.

Remember, knee strengthening exercises should complement your overall training programme.

Stand and hold a chair or counter for support. Bend one knee and bring your heel up toward your buttock, keeping your thighs roughly in line. Hold for a count of three, then lower slowly. Avoid swinging the hip. Do 10 reps each side.

The work should be felt in the back of the thigh, not the front of the hip. If you arch your back to lift higher, you’ve gone too far. Lower the range and keep the movement clean. You can add an ankle weight later as you progress.

The trade-off with standing curls is that they don’t load the hamstring heavily. That’s fine early on. If you need more, a resistance band or a seated curl machine gives you progression once the basic version feels light.

5. Glute Bridges , Hip Support for Healthier Knees

Glute bridges strengthen the hips and backside, which sounds odd for a knee exercise until you see how it works. Weak glutes let the knee drift out of line, so strengthening the hip steadies the joint below it.

They’re best for almost everyone with knee pain, especially people who sit a lot. The American Physical Therapy Association notes that strengthening the hip and core muscles helps balance the force on the knee joint during walking and running.

Lie on your back with knees bent and feet flat. Tighten your stomach, press through your heels, and lift your hips a few inches off the floor. Squeeze your glutes at the top, then lower slowly. Keep your shoulders on the floor. Do 10 to 12 reps.

These knee strengthening exercises can improve your overall mobility and stability.

This is one of the knee strengthening exercises people most often do wrong by pushing through their toes or arching the back. Drive through the heels and let the glutes do the lifting. You should feel it in your backside, not your lower back.

If you feel it mostly in your hamstrings, move your feet a touch closer to your body. Small position changes make a big difference in where the work lands. For a wider set of guided moves, Laurens Holve Healthcare’s rehabilitation exercise library covers bridges and progressions step by step.

6. Calf Raises , Stabilising the Lower Leg

Calf raises strengthen the muscles below the knee that help absorb impact when you walk and run. Stronger calves take some of the shock that would otherwise travel up into the joint.

Many athletes incorporate knee strengthening exercises into their routines to enhance performance.

They suit walkers, runners, and anyone whose knee aches after being on their feet. The calf is easy to forget, but it does real work in protecting the knee.

Stand near a wall or counter for balance. Rise up onto the balls of your feet, hold for a second at the top, then lower slowly. Do 12 to 15 reps. To make it harder, do them one leg at a time or off the edge of a step for a bigger range.

One writer at Fit&Well reported that doing calf raises every day for 30 days noticeably reduced their knee pain and made running easier. That’s one person’s experience, not a guarantee, but it lines up with how lower-leg strength supports the joint above it.

The slow lowering phase is where the strength is built, so don’t drop down fast. If your ankles feel wobbly, keep both hands on a support until your balance improves.

How to Choose the Right Exercises for Your Knees

Not every exercise fits every knee. The right starting point depends on your pain level, what triggers it, and what you’re trying to get back to. A general rule: start gentle and load the joint more only as comfort allows.

Mild aches usually respond well to a home programme done consistently. Research backs this up. The American Physical Therapy Association reports that 70% of patients with a meniscus tear who were considered surgical candidates didn’t need surgery after trying physical therapy first.

Use this table to match an exercise to where you’re at.

Build at least two strength sessions into your week. If pain gets worse or doesn’t improve within a month, get assessed. Pain that follows a fall, a knee that locks or gives way, or significant swelling all need proper attention rather than home exercise. Our knee pain specialist clinics in North London and Woking can build a programme tailored to your knee rather than a generic one.

To maximise benefits, perform knee strengthening exercises regularly.

“Motion is lotion.” Gentle, regular movement feeds the cartilage and keeps the joint working better than rest alone.

Frequently Asked Questions

How often should I do knee strengthening exercises?

Aim for at least two 20-minute sessions a week to start, with a rest day between them. Consistency matters more than intensity. Most people feel a difference within a few weeks of regular knee strengthening exercises. If you’re recovering from an injury, follow the pacing your osteopath or physical therapist gives you rather than rushing.

Is it better to rest or exercise with knee pain?

Integrating knee strengthening exercises can lead to long-term improvements.

Gentle movement is usually better than rest for most non-traumatic knee pain. Staying still too long stiffens the joint and weakens the muscles that support it. Short rest helps in the first day or two of an acute injury, but beyond that, controlled exercise supports circulation and recovery. Sharp pain, swelling, or instability are reasons to stop and get checked.

What exercises should I avoid with bad knees?

Avoid deep squats, high-impact jumping, and forcing any movement through sharp pain when your knees are sore. These overload the joint and can set recovery back. Build strength first with low-load moves like straight leg raises and glute bridges, then add more demanding exercises as comfort improves. If a movement causes pain during or after, scale it back.

How long until knee strengthening exercises reduce pain?

Many people notice less pain within two to four weeks of doing knee strengthening exercises consistently, though full progress can take longer. Cartilage and muscle adapt slowly, so steady effort beats occasional hard sessions. If you’ve seen no improvement after a month, that’s a signal to get a proper assessment rather than push harder on your own.

Understanding your body’s response to knee strengthening exercises is crucial for effective rehabilitation.

Can I strengthen my knees if I have arthritis?

Yes, strengthening helps with arthritis. Stronger muscles around the joint share the load and reduce the force that wears down cartilage. Low-impact moves like straight leg raises, glute bridges, and gentle wall sits are good starting points. Research shows people with knee osteoarthritis who follow a strengthening programme report less pain and better quality of life.

Consult a professional for a tailored programme of knee strengthening exercises if needed.

Conclusion

Incorporating knee strengthening exercises into your daily routine can lead to excellent results.

If you only start with one of these, make it the straight leg raise. It’s gentle, safe, and builds the quad strength that supports everything else. Pick two or three that match your situation, do them twice a week, and give them a month.

To conclude, consistency in knee strengthening exercises is key for optimal results.