How kids and young adults regulate body temperature during exercise at different ambient temperatures

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

Healthy participants in two age groups perform short bouts of moderate-intensity exercise in a temperature-controlled chamber at 22°C, 26°C, 31°C, and 36°C. Each visit includes four 15-minute exercise periods with rests in between, allowing precise measurement of heat loss and thermoregulation. Researchers compare responses between youths and young adults to see how ambient temperature affects heat exchange and tolerance during physical activity. The study uses a whole-body air calorimeter to quantify body heat loss during exercise.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Healthy male or female.
* Aged 9-16 years or 20-25 years.
* Habitually active, defined as participating in regular physical activity at least 3 times per week for at least 20 minutes per session over the previous 6 months.
* Able to understand and communicate in English or French.
* For participants younger than 18 years, written parental or guardian consent and participant assent are required.

Exclusion Criteria:

* Acute illness at the time of testing (e.g., cold, flu, or infection).
* History of a chronic medical condition that may affect thermoregulation, cardiovascular function, or exercise capacity (e.g., cardiovascular disease, metabolic disorders, respiratory disease including asthma requiring regular medication, or neurological disorders).
* Use of medications known to affect thermoregulation, hydration status, or cardiovascular responses.
* History of heat-related illness (e.g., heat exhaustion or heat stroke).
* Digestive abnormalities or gastrointestinal conditions that may contraindicate ingestion of a telemetry pill.
* Any condition that, in the opinion of the investigators, would compromise participant safety or the integrity of the data.

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.