Exercise Intensity and Heat Responses in Children and Youth

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.