Early sport specialization may harm teen hips, study warns
NCT ID NCT03891563
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study follows 201 healthy teens aged 12-14 over two years to see if playing only one sport year-round leads to hip impingement (FAI), a condition where hip bones rub together. Participants get MRI scans and fill out questionnaires. The goal is to understand if early sport focus causes hip damage and to inform prevention strategies.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If this study finds a link between early sport specialization and hip impingement, it could lead to training guidelines to prevent hip problems in young athletes.
- What could go wrong
- This is an observational study, not a treatment trial. It cannot prove cause and effect, only show patterns. Results may not apply to all teens or sports.
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.
- Participants
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201 people
The number who actually took part.
- Started
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Oct 2017
- Expected to finish
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Dec 2025
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.
Who is studied
The study population will be comprised of adolescents aged 12-14 with no prior or ongoing hip comorbidities, and consent to receiving MRI scans at baseline and 2 years.
- Ages
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12 to 14 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
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: 1. asymptomatic males and females between the ages of 12-14 years 2. ability to speak, understand, and read the language of the clinical site 3. provision of informed child assent (if applicable) and parental consent. Exclusion Criteria: 1. hip is mature (i.e. closed physes) based on the baseline MRI scan 2. hip complaints or pain in the hip 3. previous trauma to the hip 4. previous surgery on the hip 5. significant medical co-morbidities (requiring daily assistance for ADLs) 6. history of or ongoing paediatric hip disease (Legg-Calve-Perthes; slipped capital femoral epiphysis, hip dysplasia) 7. participants that have contraindications and/or are unwilling to undergo an MRI (e.g. claustrophobia) 8. participants who will likely have problems, in the judgment of the investigator, with maintaining follow-up 9. any other reasons the investigator feels is relevant for excluding the subject.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Chu du Quebec
Québec, Quebec, G1J1Z4, Canada
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Erasmus Medical Centre
Rotterdam, Netherlands
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Kyungpook National University Hospital
Daegu, Gyeongsangbuk-do, 41944, South Korea
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McMaster University
Hamilton, Ontario, L8N3Z5, Canada
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