Knee Pain from Cycling: Causes, Bike Fit and Exercises

Why cyclists get knee pain in the first place

Knee pain is one of the most common complaints among cyclists, from casual commuters to people training seriously, and that has everything to do with the nature of the movement. Your knee goes through thousands of repetitions per hour, largely on a fixed path, with little room to deviate from the movement pattern your bike imposes on you.

That repetitive nature is exactly why small deviations can turn into bigger problems. A saddle set a few millimetres too low, a cleat rotated slightly off, or a knee that tracks a bit differently because of weak hip muscles: on its own it seems like nothing, but multiplied by thousands of pedal strokes it can start to cause friction, literally and figuratively.

Most cycling-related knee pain is what's called an overuse complaint. There's usually no acute trauma, no fall, no sudden pop. It builds up gradually, often after an increase in training volume, a new bike, or a change in your riding position. That's actually good news: overuse complaints generally respond well to a combination of position adjustments, targeted training and, where needed, physiotherapy.

Pain at the front, back, inside or outside: what does location tell you?

Where your knee pain sits gives a first clue about the underlying cause, though this is no substitute for a proper assessment. Think of it as a guide for what to look into rather than a diagnosis.

Pain at the front of the knee

Pain around or behind the kneecap, often called patellofemoral pain, is the most commonly reported form among cyclists. You typically notice it when climbing, walking down stairs after a ride, or after sitting with a bent knee for a long time. It's often associated with a saddle that's too low, a gear that's too heavy, or insufficient strength in the outer thigh muscle relative to the inner one.

Pain at the back of the knee

Pain behind the knee is more often linked to a saddle that's actually too high, causing the knee to nearly fully extend on every pedal stroke. A tight or overloaded hamstring can also play a role here, particularly in cyclists who spend a lot of time pushing hard on the big ring.

Pain on the inside of the knee

Pain on the inner side is regularly linked to cleats rotated too far outward, a saddle that's too high, or feet that drift inward while pedalling. A wide bottom bracket relative to your hip width can also be a contributing factor.

Pain on the outside of the knee

This is often connected to the iliotibial band, a band of connective tissue running from your hip to just below your knee. In cyclists, this kind of pain often develops from a combination of a saddle or pedals set too narrow, a cleat angle pointing too far inward, and weak hip abductors that fail to keep the knee stable enough while pedalling.

Saddle height, cleats and cadence: the bike fit checklist

Bike fit is by far the most underestimated factor in knee pain. Most cyclists set their saddle once and never look at it again, even as their body, bike or training goals change. Run through this checklist.

Saddle height

A commonly used rule of thumb is that your knee should still have a slight bend, roughly 25 to 35 degrees, at the lowest pedal position (6 o'clock). If your leg is nearly straight there, the saddle is likely too high. If you feel a lot of tension at the front of the knee at the top of the pedal stroke, the saddle may be too low.

Fore-aft saddle position and tilt

The horizontal position of the saddle determines how far your knee sits over the pedal axle at the top of the stroke. A saddle positioned too far forward pushes the knee too far over the pedal and increases load on the patellar tendon. A slight tilt of the saddle, just a few degrees, can already change how your pelvis tilts and, in turn, how your knee tracks.

Cleat position

The rotation of your cleat, and therefore of your foot in the pedal, directly affects how your knee moves while pedalling. Cleats that allow zero play can block a natural rotation of the leg and trigger complaints as a result. Most cyclists do well with pedals that allow some lateral freedom (float), so the foot can move slightly while pedalling.

Cadence and gearing

A low cadence combined with a heavy gear puts a lot of force through the knee on every stroke. Many cyclists with knee pain find relief by deliberately riding a higher cadence, somewhere between 85 and 95 revolutions per minute, and choosing a lighter gear on climbs instead of grinding through on raw strength.

A proper bike fit maps out all of these factors and brings them into balance. If you're unsure about your saddle height, cleat position or frame geometry, a professional bike fit is often a sensible first step, especially if complaints keep returning after adjustments you try yourself.

The weak links: hip mobility and core strength

Cycling is a closed-chain movement: your foot is fixed to the pedal, so forces that aren't properly absorbed at the hip or trunk are often passed on to the knee. That's why, with persistent knee pain, we always look further than the knee itself.

Limited hip mobility, particularly in hip flexion and rotation, can cause the pelvis to compensate while pedalling, which affects knee alignment. Weak hip abductors and external rotators, such as the gluteus medius, let the knee drift slightly inward (valgus) during the power phase of the pedal stroke, which is associated with patellofemoral and iliotibial band complaints.

A weak core contributes in a similar way: without a stable trunk, the body looks for compensation elsewhere, and that often ends up at the knee. Working on hip stability and core strength is therefore a standard part of a good approach to cycling-related knee pain, alongside adjustments to the bike itself.

Training load: too much, too soon, too heavy a gear

Besides position and strength, training progression is one of the biggest risk factors. Knee pain regularly shows up after a sharp increase in mileage, a sudden shift toward more hill training, or a new heavy gear the knee isn't used to yet.

A gradual build-up, where you increase volume and intensity in small steps rather than big jumps, gives tendons and joints time to adapt. If you're building into a new season, coming back from a break, or moving from indoor training to outdoor riding, plan for a transition period where you deliberately keep load low.

Also pay attention to recovery between sessions. Knee pain that only shows up with fatigue, toward the end of a long ride, can point to a combination of insufficient strength and too little recovery time between intense sessions.

5 strength exercises for cyclists

The following exercises target the muscle groups that are often a weak link for cyclists: the hip abductors, the hip external rotators, the quadriceps and the core. Build them up gradually, start with lower repetitions and increase slowly over time. Stop if you feel pain, and consult a physiotherapist if an exercise keeps provoking symptoms.

1. Clamshell

Lie on your side with knees bent and feet together. Lift your top knee without rotating your pelvis, as if opening a clamshell. Keep your trunk stable. This targets the hip external rotators, a common weak link in pain on the outside of the knee.

2. Single-leg bridge

Lie on your back with knees bent. Lift one foot off the floor and push through the other foot to raise your hips until your trunk and thigh form a straight line. Keep your pelvis level, without letting the hip on the lifted side drop. This strengthens the glutes and hamstrings, which help stabilise knee tracking while pedalling.

3. Step-up

Step up onto a raised surface (a low bench or stair step) with one leg and come all the way up without pushing off with the other leg. Keep your knee tracking in line with your second and third toes instead of letting it cave inward. This builds functional leg strength that's close to the cycling movement.

4. Wall sit

Stand with your back against a wall and slide down until your knees are roughly at a right angle, as if sitting in an invisible chair. Hold this position for a period of time. This builds static quadriceps strength without heavily loading the patellar tendon, making it a suitable build-up exercise for pain at the front of the knee.

5. Plank with leg lift

Get into a forearm plank and alternately lift one leg a few centimetres off the ground, without letting your pelvis rotate. Keep the rest of your body stable. This trains the core stability needed to transfer force efficiently from trunk to leg while pedalling.

Build these exercises in two to three times a week alongside your cycling training, as an addition rather than a replacement for it. With persistent or recurring pain, it's wise to have the build-up and execution assessed together with a physiotherapist, so the exercises match what your knee can handle at that moment.

When does bike fitting help, and when is it physiotherapy?

Bike fitting and physiotherapy aren't competitors, they complement each other. A bike fit is particularly valuable when complaints are linked to the setup of the bike itself: saddle height, saddle position, cleat angle or frame geometry. A good bike fitter looks at both the bike and how your body relates to it.

Physiotherapy is the logical next step, or starting point, when the cause lies deeper: limited hip mobility, a weak core, an imbalance between muscle groups, or a tendon that's become overloaded and needs targeted, progressively built-up loading to recover. At Physical Studio we combine, where useful, ultrasound imaging to visualise tissue with VALD Force Decks measurements to objectively capture strength differences between left and right, so a training plan matches what's actually going on.

Symptoms you might recognise as hip pain or as a form of runner's knee can overlap with cycling knee pain, since the underlying weak links are often similar. Broader knee complaints that show up beyond cycling alone also deserve a wider assessment than just your riding position.

If pain persists despite adjustments, if swelling around the knee increases, if the knee feels unstable or suddenly gives way, or if the pain started after a fall or a direct blow to the knee, contact your GP to rule out other causes. Persistent, severe or night-time pain that doesn't respond to rest is also a reason to have it assessed by a doctor.

For most cycling-related overuse complaints, the earlier you map out the cause, the more targeted the approach can be. If you're unsure whether physiotherapy makes sense for your situation, you can always book an appointment for an assessment. It's directly accessible, so you don't need a referral. Physiotherapy is typically covered under supplementary insurance, depending on your policy, so check your coverage in advance, for example via the insurance checker on our site.