Recovery · Pain
Knee pain
Why loading usually beats resting for knee pain, the exercises with the best support, what patellofemoral pain responds to, and when to get assessed.
The instinct with a painful knee is to protect it. For the most common presentations, that instinct is backwards — the tissue that hurts usually needs more capacity, and capacity comes from load.
Loading beats resting
For patellofemoral pain and for tendinopathy, the two most common non-traumatic knee problems in active people, structured strengthening consistently outperforms rest.
The reasoning is straightforward. Tendon and cartilage adapt to the demands placed on them. Remove the demand and they become less tolerant, so the same activity that provoked symptoms provokes them again on return — usually sooner.
The skill is in dosing. You want load that is challenging without producing a flare that lasts into the next day. A common guide: pain up to about 3 out of 10 during the exercise is acceptable if it settles within 24 hours and is not worsening week to week.
What to actually do
Quadriceps strengthening, progressively. Partial-range squats within a comfortable depth, goblet squats to whatever depth is tolerable, step-ups, and leg extensions within a pain-free range. Increase load over weeks.
Hip work. Weak hip abduction and external rotation are associated with patellofemoral pain, and hip strengthening reliably features in effective programmes. Side-lying abduction and banded work are the usual starting points.
Hamstrings. Leg curls balance the front-loaded work and are well tolerated by most painful knees since they do not compress the kneecap.
Isometrics for tendon pain. Holding a position under load — a wall sit, or a mid-range leg extension hold for 30 to 45 seconds — often produces a genuine analgesic effect for patellar tendinopathy and is a useful way to train when moving through range is too provocative.
Patellofemoral pain specifically
The classic pattern: diffuse ache around or behind the kneecap, worse on stairs (especially descending), with squatting, with running, and after sitting still for a long time — the last of these is common enough to have a name, the “theatre sign”.
It responds well to the combination above, typically over eight to twelve weeks. The most frequent reason it recurs is stopping the programme once symptoms ease, usually at around week four when the strength gains are still small.
Knees past toes is not the problem
This deserves correcting because it changes how people squat and lunge.
The advice originated from a study measuring shear forces at the knee when forward travel was restricted, in isolation, without accounting for what happens elsewhere. Preventing the knee from travelling forward simply moves load to the hips and lower back.
For a healthy knee, allowing natural forward travel is fine and is how humans squat. Some acutely painful knees do better with it temporarily limited — that is a short-term modification, not a rule.
When to get it assessed
See a clinician if the knee gave way or locked, if it swelled rapidly within hours of an injury, if you cannot bear weight, if there is significant instability, or if pain is not improving after several weeks of sensible loading.
Those patterns suggest something structural — a meniscal or ligament injury — rather than the load-tolerance problems this page is about.
Common questions
What exercises are good for knee pain?
Progressive strengthening of the quadriceps and hips has the best evidence, including partial-range squats, step-ups, leg extensions within a comfortable range and hip abduction work. What matters most is loading the knee progressively at an intensity that does not flare symptoms, rather than any single exercise.
Should I rest or exercise with knee pain?
For most common knee pain, exercise. Structured loading programmes consistently outperform rest for patellofemoral pain and tendinopathy, and prolonged rest weakens the tissue that needs to tolerate load. Modify range and weight rather than stopping.
Is it OK for my knees to go past my toes?
Yes, for a healthy knee. The idea that it is dangerous came from a single study looking at shear forces in isolation and does not reflect how people move. Restricting forward knee travel simply shifts load to the hips and lower back. Some knee conditions warrant temporarily limiting it, which is a clinical decision.
What is runner's knee?
Patellofemoral pain — a diffuse ache around or behind the kneecap, typically worse with stairs, squatting, running and prolonged sitting. It is one of the most common presentations, and it responds well to progressive quadriceps and hip strengthening over eight to twelve weeks.
Do squats damage your knees?
No. Well-executed squatting is associated with better knee health, not worse, and loading builds the capacity of cartilage and tendon to tolerate stress. What causes problems is a rapid increase in load or volume, poor technique under fatigue, or returning to heavy work too soon after an injury.
How long does knee pain take to improve?
Patellofemoral pain typically improves substantially over eight to twelve weeks of consistent strengthening. Tendinopathy is slower, often three to six months. Both are slower than people expect, and stopping when it feels better is the most common reason it returns.