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Triathlon study seeks to unlock the hidden link between energy, performance, and injury

NCT ID NCT07232628

Knowledge-focused Sponsor: Bispebjerg Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 40 elite triathletes over two competitive seasons to see how their energy availability affects performance, injury risk, and overall health. Participants continue their normal training and diet while undergoing regular tests like blood samples and body scans. The goal is to find markers that signal when an athlete is not getting enough energy, which could help prevent injuries and improve training outcomes.

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 successful, this study could help identify early warning signs of low energy availability, enabling athletes and coaches to prevent injuries and optimize performance.
What could go wrong
This is an observational study with only 40 participants, so findings may not apply to all athletes. It does not test any treatment, so it cannot directly improve health or performance.

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

About 40 people

The number the study aims to enrol. It can still change while the study runs.

Started

Oct 2025

Expected to finish

Jun 2028

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

Elite triathletes with a weekly training volume of more than 15 hours

Ages

18 years and older

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: * Age ≥18 years * Healthy individuals * Training ≥15 hours/week in triathlon Exclusion Criteria: * Smokers * Use of prohibited substances (WADA list) without medical justification * Existing injuries or illnesses that could worsen due to participation

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Conditions

The condition(s) this trial relates to.

Relative Energy Deficiency in Sport

As listed by the trial registrant

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

Low energy availability Relative energy deficiency in sport

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Institute of Sports Medicine Copenhagen, Bispebjerg Hospital

    RECRUITING

    Copenhagen, Denmark

More trials for these conditions

Other studies related to the condition(s) this trial covers.