Consecutive Occupational Heat Exposure With and Without Overnight Cooling

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This interventional study examines whether recovering in an overheated indoor setting versus a recommended cool indoor environment changes physiological heat strain after consecutive work shifts in hot conditions. Participants undergo simulated occupational heat exposure under two recovery conditions: with indoor cooling at recommended temperatures and with no cooling in an overheated space. The trial focuses on core temperature, physiological responses, and tolerance to repeated heat exposure, aiming to inform guidelines for recovery environments between shifts. It targets healthy, physically active men who are English or French speakers and not regularly exposed to hot work environments. The study is conducted at the University of Ottawa under the lead sponsorship of the same institution.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Are male.
* Do not smoke or have been smoke free for at least 5 years.
* English or French speaking.
* Ability to provide informed consent.
* Are physically active (engage in exercise at least 2 times per week for ≥30 minutes)

Exclusion Criteria:

* Are regularly exposed to hot environments (e.g., occupational heat exposure)
* Experience claustrophobia or discomfort in enclosed environments
* Episode(s) of severe hypoglycemia (requiring the assistance of another person) within the previous year, or inability to sense hypoglycemia (hypoglycemia unawareness).
* Serious complications related to diabetes (gastroparesis, renal disease, uncontrolled hypertension, severe autonomic neuropathy).
* Uncontrolled hypertension - BP \>150 mmHg systolic or \>95 mmHg diastolic in a sitting position.
* Restrictions in physical activity due to disease (e.g. intermittent claudication, renal impairment, active proliferative retinopathy, unstable cardiac or pulmonary disease, disabling stroke, severe arthritis, etc.).
* Use of or changes in medication judged by the patient or investigators to make participation in this study inadvisable.
* Cardiac abnormalities identified during screening

Where it's running

• University of Ottawa
  Ottawa, Ontario, Canada Recruiting

Study contacts

• Study coordinator: Glen P Kenny, PhD
• Email: gkenny@uottawa.ca
• Phone: 6135625800

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.