What Are the Best Exercises for Knee Pain?
The best knee strengthening exercises work the quadriceps, hamstrings and glutes. These muscles support and stabilise the joint. Gentle, low-impact movements such as isometric holds, partial squats and step-downs are widely recommended. But the right programme depends on why your knee hurts. Understanding your alignment first helps you exercise safely.
Key points
- Strong quads, hamstrings and glutes reduce the load on the knee joint.
- Low-impact exercises like isometric holds and step-downs are a safe place to start.
- Pain during exercise is a signal to stop, not to push through.
- A muscle imbalance or an alignment problem elsewhere can change which exercises suit you.
- A standing alignment assessment can show problems that lying-down scans miss.
Knee pain is one of the most common reasons people look for exercises they can do at home. Strengthening the muscles around the knee is a well-supported approach. Many people get real relief from a regular routine. But not every exercise is right for every knee. Pain that keeps coming back, or that started without a clear injury, may be linked to how your whole leg is aligned under load.
Why does alignment matter before you start knee exercises?
Alignment matters because the knee sits between two strong levers: your hip and your ankle. If either one is slightly rotated, tilted or shifted, the knee takes uneven load every time you stand, walk or exercise. Strengthening a knee that is already out of line can sometimes make pain worse rather than better.
Your body is a connected chain from your feet to your head. A slight tilt at the hip, a rotated foot or a difference in leg length can change how the kneecap tracks. It can also put extra stress on one side of the joint. This is why two people with the same diagnosis can respond very differently to the same exercise programme.
Conditions like chondromalacia patella or patellar tendonitis are often driven by how load travels through the leg. Exercises help, but knowing the underlying cause helps even more.
Which knee strengthening exercises are usually recommended?
Low-impact exercises that build strength without too much stress on the joint are the most common starting point. The groups below cover the muscles that matter most for supporting the knee.
Tighten the muscle at the front of your thigh without bending the knee. Hold for a few seconds, then relax. This builds quadriceps strength with very little joint movement.
Lean against a wall and lower yourself a short way. Keep your knees behind your toes. This works the quads, hamstrings and glutes together in a controlled range of motion.
Stand on a low step and slowly lower the other foot towards the ground. This trains the quad and glute medius under controlled load and improves how the kneecap tracks.
Lie on your back with your knees bent, then lift your hips. This strengthens the glutes and hamstrings, which support knee stability from above.
Lie on your side and lift your top leg. This works the glute medius, a key muscle for controlling how the knee tracks when you walk and use stairs.
Standing or lying down, gently bend the knee against light resistance. Balancing quad and hamstring strength is important for a stable knee joint.
These exercises are general starting points. Your physiotherapist can adjust the range of motion, how the load increases and the number of repetitions to suit you. The aim is always to build strength step by step without increasing pain.
Which knee exercises should you avoid?
Some exercises put high or sudden load on the knee joint. They may not suit people who already have pain. As a general rule, be careful with the following until you understand the cause of your pain.
- Deep squats or lunges that bend the knee well past a right angle can overload the kneecap, especially if it tracks poorly.
- Leg extensions with heavy weight isolate the quad in a way that can increase pressure behind the kneecap.
- High-impact plyometrics such as box jumps or burpees send sudden force through the joint.
- Running on hard surfaces may make symptoms worse if your alignment or footwear has not been checked.
These are not banned forever for everyone. Once you know the cause of your knee pain and have built a base of strength, your physiotherapist may bring them back at the right stage.
Not sure what is behind your knee pain? Understanding your alignment can help you and your physiotherapist choose the right exercises from the start.
Book a free video consultationHow does a standing alignment assessment help with knee rehab exercises?
A standing assessment shows how your bones and joints line up under your full body weight. This is exactly how they work when you exercise. Standard scans are usually done lying down. That relaxes your muscles and lets gravity flatten your posture. This can hide alignment problems that only show when you are upright.
An EOS scan captures your whole leg, from hip to ankle, in one standing image. It shows joint angles, rotation and weight distribution as they really are. This can reveal small shifts, like a slightly rotated hip or uneven leg length. These can explain why your knee tracks poorly and which muscles need the most attention.
ScanAlign standing EOS imaging uses about 90% less radiation than a standard X-ray, around ten times less.
A standard X-ray, CT or MRI is taken while you lie on a table. Without body weight pressing through the joints, small tilts and shifts can disappear. You get a clear picture of the bones, but not of how they behave when you stand, walk or exercise.
When is MRI the better choice? EOS shows bones, joints and alignment clearly. For soft tissue problems such as ligament tears, cartilage damage or nerve problems, MRI is usually the better tool. Your treating specialist can advise which scan suits your situation.
When should you get help for knee pain instead of just exercising?
Exercise is valuable, but it is not always the right first step. Get professional advice before you start a knee rehab programme if your pain has lasted more than a few weeks, if it is getting worse, or if it started without a clear cause. Persistent pain, swelling or a knee that gives way should be looked into.
- Knee pain keeps coming back despite exercises
- Pain moves between your knee, hip and lower back
- You have been told your scans look normal but the pain continues
- You want to book an assessment before you start a rehab programme
- Your knee is hot, red and badly swollen
- You cannot put any weight on the leg
- You have numbness, weakness or loss of feeling in the leg
- Pain started after a serious injury or fall
If you have sudden weakness, numbness, or loss of bladder or bowel control along with leg or back pain, contact your doctor straight away or go to your nearest emergency department. These symptoms need urgent medical attention.
Before you start treatment, or change the one you are on, it is worth getting a detailed diagnosis. Knowing whether the cause sits in your pelvis, your legs or your spine changes what will actually help.
Frequently asked questions
Low-impact movements such as isometric quad holds, glute bridges and partial wall squats are widely recommended for sore knees. They strengthen the muscles that support the joint without putting too much stress on it. Start gently and stop if the pain increases.
Most physiotherapy guidelines suggest doing knee strengthening exercises three to five times a week. Doing them regularly matters more than doing them hard. Your physiotherapist can set the frequency to suit your condition and how much load you can manage.
Mild discomfort during exercise can be normal, but sharp or worsening pain is a signal to stop. Pain during exercise often means the load is too high, the range of motion is too deep, or the underlying cause has not been dealt with. Get professional advice if the pain persists.
A standard X-ray is taken lying down and usually looks at the knee alone. It may miss alignment problems that only show when you are standing and bearing weight. It also does not show the hip and ankle, which can both affect the knee. A full standing assessment can help explain pain that standard scans do not.
Yes. The glute medius muscle helps control inward rotation of the thigh. When it is weak, the knee can drift inwards under load. This changes how the kneecap tracks and increases stress on the joint. Glute strengthening is a key part of most knee rehab programmes.
Quad exercises strengthen the front of the thigh and help support the kneecap. Hamstring exercises strengthen the back of the thigh and help stabilise the joint from behind. Balance between both muscle groups is important. A muscle imbalance between them can contribute to pain.
No. ScanAlign is a self-referral clinic. You do not need a letter or referral from your doctor or a consultant. You can book a free video consultation directly to discuss whether a standing alignment assessment is right for you.
An EOS scan uses about 90% less radiation than a standard X-ray, around ten times less. This makes it one of the lowest-dose skeletal imaging options available.
The price for patients travelling from abroad is confirmed during the free video consultation. The consultation costs nothing and helps you understand whether the scan is right for your situation.
Exercises can strengthen the muscles around the knee and reduce symptoms significantly. But if the underlying cause is a structural alignment problem, exercises alone may not fully resolve it. Understanding your alignment helps your physiotherapist design the most effective programme for you.
Understand your knee before you strengthen it
A free video consultation lets you talk about your knee pain from home and find out whether a standing alignment assessment in London could help guide your rehab.
Book a free video consultationAuthor: Abbas Dhami (Specialist Diagnostic Radiographer)
Sources
- Bennell KL, Hinman RS. A review of the clinical evidence for exercise in osteoarthritis of the hip and knee. Journal of Science and Medicine in Sport. 2011;14(1):4-9.
- National Institute for Health and Care Excellence (NICE). Osteoarthritis: care and management. Clinical guideline CG177. 2014 (updated 2022).
- Powers CM. The influence of abnormal hip mechanics on knee injury: a biomechanical perspective. Journal of Orthopaedic & Sports Physical Therapy. 2010;40(2):42-51.
This page is general information and not a diagnosis.
ScanAlign is the trading name of CoreMed Solutions Ltd and operates under The Harley Street Hospital's CQC licence.