Could restricting blood flow during exercise ease knee pain?
NCT ID NCT05484141
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether applying blood flow restriction during leg exercises can improve muscle size, strength, and knee pain in people with minor patellar instability. Thirty-four adults with anterior knee pain for at least 3 months will do rehab twice a week for 8 weeks, either with or without blood flow restriction. The goal is to see if this low-intensity method helps recovery without heavy strain on the knee.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- blood flow restriction during rehabilitation
- What this could lead to
- If it works, this could offer a more effective rehab approach for people with minor knee instability, helping them regain strength and reduce pain without heavy weights.
- What could go wrong
- This is a small, early-stage trial with only 34 participants, so results may not apply widely. The intervention is not a cure and only aims to ease symptoms.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 34 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Jan 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 40 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Being between the ages of 18-40 years, * Volunteering to participate in the study, * Having a complaint of anterior knee pain for at least 3 months, * Having been diagnosed with unilateral minor patellar instability, * Absence of any other ongoing clinical problems that interfere with exercise (will be questioned by the Physical Activity Readiness Questionnaire for All). Exclusion Criteria: * History of one or more traumatic-atraumatic patella dislocations, * Evidence of osteoarthritis on radiological imaging (≥ Kellgren-Lawrence Stage 2) * Having at least one of the contraindications preventing the application of blood flow restrictive exercises (Smoking, previous venous thromboembolism, risk of peripheral vascular disease (ankle-brachial index \<0.9), coronary heart disease, hypertension, hemophilia, etc.), * Previously diagnosed cardiovascular disease limiting effort capacity (Myocardial infarction, angina, exercise intolerance, etc.), * Previously diagnosed neurological disorder or cognitive dysfunction (stroke, dementia, schizophrenia, etc.), * Orthopedic lower extremity surgery in the last 1 year, * Body mass index ≥ 30 kg/m2.
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As listed by the trial registrant
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How to take part
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The official record
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A doctor treating you
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