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Early sport specialization may harm teen hips, study warns

NCT ID NCT03891563

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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

201 people

The number who actually took part.

Started

Oct 2017

Expected to finish

Dec 2025

An estimate. End dates often move.

Lead sponsor

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

12 to 14 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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.

Femoracetabular Impingement

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Chu du Quebec

    Québec, Quebec, G1J1Z4, Canada

  • Erasmus Medical Centre

    Rotterdam, Netherlands

  • Kyungpook National University Hospital

    Daegu, Gyeongsangbuk-do, 41944, South Korea

  • McMaster University

    Hamilton, Ontario, L8N3Z5, Canada

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