By Luther Chiew (Physiotherapist)
Premier Sports Medicine
Pain on the outside of the knee that builds during a run can fit an iliotibial band pain pattern. It often starts after a fairly predictable time or distance and settles when you stop. That pattern is useful, but it does not prove the diagnosis. Lateral knee pain has several possible causes, so recurring symptoms deserve an individual assessment.
Need help with recurring running pain? See our Running Injury Clinic assessment and treatment.
Quick takeaways
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IT band pain is usually felt near the outside of the knee.
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It often builds during running rather than appearing at rest.
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Recent changes in distance, hills, speed or recovery may contribute.
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Stretching the IT band is unlikely to be the complete answer.
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Swelling, locking, instability or pain after trauma needs assessment.
What does IT band pain feel like when running?
Runners often describe a sharp, burning or aching pain on the outer side of the knee. It may begin as a mild tight feeling and then become strong enough to change the stride or stop the run.
The pain may appear at a similar distance each time. Downhill running, long runs and routes with repeated bends or a cambered surface can be provocative for some people. The area may feel tender near the outer knee, but symptoms can also come from other structures.
Pain around the kneecap, the joint line, the hamstring tendon or referred pain from the hip or back may feel similar. This is why location alone is not enough for a diagnosis.
Why can the outside of the knee become painful?
The iliotibial band is a strong band of connective tissue that runs down the outside of the thigh. Current explanations focus less on the band “rubbing” backwards and forwards and more on compression and sensitivity of tissues near the outer knee.
Research has identified possible links with running load, hip and knee movement, strength and previous injury. The findings are mixed. A systematic review of runners with iliotibial band syndrome found that the evidence for many proposed biomechanical risk factors was limited or inconsistent.
This means no single movement test, tight muscle or weakness explains every case.
What training changes may matter?
Look at what changed before the pain began:
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a longer weekly distance;
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a sudden long run;
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more downhill running;
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faster sessions or racing;
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fewer recovery days;
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returning after time away;
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running while another injury changed your stride.
The important number is not distance by itself. It is the change from the load your body had recently adapted to.
Should you stretch or foam-roll the IT band?
Stretching or foam rolling may change how the outer thigh feels for a short time. It does not directly lengthen the IT band in a meaningful way, and it does not address every factor linked with pain.
If rolling is very painful or irritates the outer knee, stop. Treatment may include load changes, strength work and running modifications selected from the assessment findings. A generic stretch-only plan often misses the reason symptoms keep returning.
Can you keep running with IT band pain?
Some runners can keep a reduced amount of running if symptoms remain mild, do not change the stride and settle soon after the session. Others need to pause running temporarily because pain rises quickly each time.
Monitor the response during the run, later that day and the following morning. If pain begins earlier with each run, becomes sharper or affects walking and stairs, reduce the provoking load and arrange an assessment.
Do not use one pain score as a universal rule. The location, behaviour and possible diagnosis matter.
What can you change first?
Reduce the part of training that brings symptoms on most predictably. For some runners this means shortening the run before pain starts. For others it means removing downhill sessions, sharp increases in distance or back-to-back running days.
Keep other exercise that remains comfortable. Strength work may focus on the hip, knee and calf, but the exercise choice and dose should match your findings and current capacity.
Running changes such as step rate or stride cues may help selected runners. Evidence shows that gait retraining can alter biomechanics, but it does not support giving every runner the same cue.
When should you seek help?
Arrange an assessment when the pain keeps returning, starts earlier in runs, changes your stride or stops you progressing.
Seek prompt medical care after a significant injury or when the knee is markedly swollen, locked, unstable or unable to bear weight. A newly swollen, red or hot calf needs immediate medical assessment. Call 000 for chest pain, severe breathing difficulty or collapse.
What may a running assessment involve?
A runner-specific assessment may include your symptom and training history, knee and hip examination, strength and capacity testing, and observation of tasks that reproduce symptoms. Treadmill video may be used when it adds useful information.
The goal is not to find one “bad” movement. It is to work out which combination of load, capacity and movement is relevant to you.
Premier’s Running Injury Clinic:
https://premiersportsmedicine.com.au/classes-programs/running-injury-clinic/
Common questions
Is IT band pain the same as runner’s knee?
“Runner’s knee” is a loose term that often refers to pain around the kneecap. IT band pain is usually felt at the outer knee. An assessment can help separate these and other causes.
Does a tight IT band cause the problem?
The outer thigh may feel tight, but research does not support treating tightness as the sole cause. Training load, strength, movement and local tissue sensitivity may all contribute.
Will changing cadence help?
A small cadence change can alter running mechanics. It should be tested against your symptoms rather than prescribed automatically.
How long does recovery take?
There is no fixed timeline. It depends on symptom irritability, how long pain has been present, training demands and the response to rehabilitation.
References
Sanchez-Alvarado et al. Conservative treatment strategies for iliotibial band syndrome in runners, 2024:
https://pubmed.ncbi.nlm.nih.gov/39247485/
van der Worp et al. Iliotibial band syndrome in runners: a systematic review:
https://pubmed.ncbi.nlm.nih.gov/22994651/
Foch et al. Lower-extremity kinematics and hip strength in iliotibial band syndrome:
https://pubmed.ncbi.nlm.nih.gov/36758425/
If running pain keeps returning or is stopping you from progressing, book a Running Injury Assessment with Premier Sports Medicine:
https://premiersportsmedicine.com.au/classes-programs/running-injury-clinic/
About the author
Luther Chiew is a physiotherapist at Premier Sports Medicine with an interest in running, sports and overuse injuries. His background includes strength and conditioning, and he holds a Bachelor of Applied Science and a Master of Physiotherapy Practice from La Trobe University.
Read Luther’s practitioner profile.
Clinical content reviewed and approved by Luther Chiew, Physiotherapist.
This article provides general education. An individual assessment may lead to different advice.
