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Hot springs for athletes: a soaking solution to fatigue?

NCT ID NCT07615478

Knowledge-focused Sponsor: Macao Polytechnic University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tests whether soaking in hot spring water helps teenage rowers recover from central fatigue and maintain mental sharpness during high-altitude training. Twenty-seven athletes aged 12-16 will either rest normally, bathe in plain warm water, or bathe in sodium bicarbonate hot spring water three times a week for four weeks. Researchers will measure muscle activation, cognitive tests, and blood markers to see if the hot springs provide any extra benefit.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
hot spring water (sodium bicarbonate)
What this could lead to
If it works, this could point toward a simple, drug-free way to help athletes recover from intense training and keep their minds sharp.
What could go wrong
This is a very small, early study in healthy teen athletes, so results may not apply to others. The benefits might be small or not show up at all.

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

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

About 27 people

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

Expected to start

May 2026

An estimate. Start dates often move.

Expected to finish

Jun 2026

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.

Ages

12 to 16 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: * Male or female aged 12-16 years- Healthy with no serious chronic diseases or skin conditions * At least 1 year of systematic rowing training experience * Currently undergoing centralized altitude training at approximately 1600 meters- No history of systematic hot spring or spa immersion within the past month * No allergy history to sodium bicarbonate or hot spring minerals- Ability to provide written informed assent (participant) and written informed consent (parent/guardian)- No acute infection, fracture, or surgery within the past month * Not currently taking non-steroidal anti-inflammatory drugs (NSAIDs), immunosuppressants, or medications affecting autonomic or cognitive function Exclusion Criteria: * History of cardiovascular, respiratory, renal, endocrine, or neurological disorders- Uncontrolled hypertension or hypotension * History of syncope, heat intolerance, or severe dizziness during hot water immersion- Open wounds, severe eczema, or other skin conditions contraindicating water immersion * Current use of beta-blockers, anticholinergics, stimulants, sedatives, or other medications affecting central nervous system function * Color blindness or uncorrected visual impairment affecting Stroop test performance- Pregnancy (for female participants)- Alcohol consumption or smoking * Shift work or trans-meridian travel within 2 weeks prior to baseline assessment * Any condition deemed by the investigator as unsafe for participation

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Conditions

The condition(s) this trial relates to.

altitude sickness Cognitive Dysfunction

As listed by the trial registrant

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

Altitude training Balneotherapy Central fatigue Cognitive impairment Hydrotherapy Sports performance

How to take part

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  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

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Contacts and locations

Locations

  • Macao Polytechnic University

    RECRUITING

    Macao, Macao, China

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