Efficacy of Electric Fans in Children During Heat Waves

Inclusion Criteria: * Participants must be healthy males or females within the specified age ranges (9-12 years, 13-16 years, or 20-25 years). * All participants must be habitually active, defined as participation in regular physical activity at least three times per week for a minimum of 20 minutes per session over the previous six months. * Participants must be able to understand and communicate in English or French. * For participants under 18 years of age, written parental or guardian consent and participant assent will be required prior to participation. Exclusion Criteria: * Individuals will be excluded from participation if they have any acute illness at the time of testing (e.g., cold, flu, or infection), or a history of chronic medical conditions that may affect thermoregulation, cardiovascular function, or exercise capacity, including but not limited to cardiovascular, metabolic, respiratory, or neurological disorders. Individuals taking medications known to influence thermoregulation, hydration status, or cardiovascular responses will also be excluded. * Participants with a history of heat-related illness (e.g., heat exhaustion or heat stroke) will not be eligible. * Individuals with digestive abnormalities or gastrointestinal conditions that may contraindicate ingestion of a telemetry pill will also be excluded. * Any individual who, in the opinion of the investigators, may be at increased risk or unable to safely complete the study procedures will be excluded.