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Could slowing down or taking breaks in the heat protect older Workers' hearts?

NCT ID NCT06599788

Disease control Sponsor: State University of New York at Buffalo Source: ClinicalTrials.gov ↗

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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 30, 2026 · Last updated Jul 01, 2026 · Updated 1 time

Summary

This study compares different work schedules to see if changing the pace or adding rest breaks can reduce strain on the heart and muscles during heat exposure. Healthy adults aged 18-29 and 40-65 will perform a box-carrying task in a hot, humid room. Researchers will measure heart stress and body temperature to find the safest way to work in the heat.

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 could point toward safer work schedules for older adults in hot environments, reducing the risk of heat-related illness.
What could go wrong
This is a small lab study with only 32 participants, so results may not apply to real-world conditions or all workers. The interventions are short-term and may not reflect long-term effects.

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 32 people

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

Expected to start

Sep 2027

An estimate. Start dates often move.

Expected to finish

Sep 2029

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

18 to 65 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: * Healthy individuals * 18-29 years old and 40-65 years old * Completes at least 120 minutes of moderate to vigorous physical activity each week for at least the past 4 weeks * Resistance trained or have recently held a job involving box carrying or a similar task Exclusion Criteria: * History of cardiovascular, metabolic, respiratory, neural, or renal disease * Hypertensive (systolic blood pressure \> 139 mmHg or diastolic blood pressure \> 89 mmHg) or tachycardic (resting heart rate \> 100 bpm) during the screening visit * Current nicotine use or previous use within the past 6 months * Current of previous musculoskeletal injury limiting physical activity * A positive pregnancy test at any point during the study * Currently breastfeeding * Study physician discretion based on any other medical condition or medication

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Conditions

The condition(s) this trial relates to.

Fatigue Heat Stress Disorders Hyperthermia

As listed by the trial registrant

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

Fatigue; heat Hyperthermia Work-related condition

How to take part

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

  1. 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 ↗

  2. 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.

More trials for these conditions

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