Ambient Temperature and Thermoregulation During Exercise in Children and Youth
Body Temperature Changes · Heat Stress · Child Development · Heat · Physiological Stress
De qué trata este estudio
El registro indica que este estudio recluta participantes. La disponibilidad puede variar por centro.
- Tipo de estudio
- De intervención
- Fase
- No aplica
- Rango de edad
- 9 años - 25 años
- Sexo admitido
- Todos los sexos
- Voluntarios sanos
- Aceptados
- Participantes
- 12 Estimado
Estos son puntos de partida, no una decisión de elegibilidad. El equipo debe revisar todos los requisitos.
Las explicaciones y la navegación están en español. Los textos proporcionados por el registro, incluidos títulos, resúmenes y criterios, se conservan en su idioma original. Puedes pedir orientación en español a WCR.
Acerca de la investigación
Little is known about how children and youth regulate body temperature during exercise across different environmental temperatures compared with young adults, including whether differences in whole-body heat exchange contribute to their responses. The goal of this clinical trial is to determine how ambient temperature affects thermoregulation during exercise in boys and girls aged 9-16 years compared with young adult men and women aged 20-25 years. Participants will complete four study visits at ambient temperatures of 22°C (Celsius; 72°F, Fahrenheit), 26°C (79°F), 31°C (88°F), and 36°C (97°F), while exercising at the same moderate-intensity metabolic heat production of 160 W/m² (W = watts, m = meters). During each visit, participants will complete four 15-minute periods of exercise (exercise bouts 1, 2, 3 and 4 respectively) separated by 15-minute rest periods. Testing will be performed in a whole-body air calorimeter, a specialized chamber that precisely measures heat lost through evaporation and dry heat exchange and the amount of heat stored in the body. These measurements, together with core temperature and heart rate, will allow researchers to determine how increasing ambient temperature affects the body's ability to lose heat and whether these responses differ between children and youth and young adults.
¿Quién podría participar?
La lista siguiente contiene el texto del patrocinador. Puede incluir condiciones, tratamientos previos, resultados de pruebas y otros requisitos. Aparecer en tu búsqueda no significa que califiques.
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.
Tratamiento, grupos y participación
El registro puede describir tratamientos y duración sin incluir un calendario completo. Pide al equipo las visitas, procedimientos, riesgos, costos y alternativas. Mantén tu atención habitual salvo que tu médico te indique un cambio.
- Asignación
- Asignación al azar
- Enmascaramiento
- Sin enmascaramiento
Exercise at 22°C
Participants will complete intermittent moderate-intensity exercise at an ambient temperature of 22°C (celsius; 72°F, fahrenheit). Exercise will be performed at a metabolic heat production of 160 W/m² (W = watts, m = meters) and will consist of four 15-minute exercise periods separated by 15-minute rest periods. Exercise workload will be individually adjusted to achieve the prescribed metabolic heat production.
Other: Exercise at 22°C
Exercise at 26°C
Participants will complete intermittent moderate-intensity exercise at an ambient temperature of 26°C (79°F). Exercise will be performed at a metabolic heat production of 160 W/m² and will consist of four 15-minute exercise periods separated by 15-minute rest periods. Exercise workload will be individually adjusted to achieve the prescribed metabolic heat production.
Other: Exercise at 26°C
Exercise at 31°C
Participants will complete intermittent moderate-intensity exercise at an ambient temperature of 31°C (88°F). Exercise will be performed at a metabolic heat production of 160 W/m² and will consist of four 15-minute exercise periods separated by 15-minute rest periods. Exercise workload will be individually adjusted to achieve the prescribed metabolic heat production.
Other: Exercise at 31°C
Exercise at 36°C
Participants will complete intermittent moderate-intensity exercise at an ambient temperature of 36°C (97°F). Exercise will be performed at a metabolic heat production of 160 W/m² and will consist of four 15-minute exercise periods separated by 15-minute rest periods. Exercise workload will be individually adjusted to achieve the prescribed metabolic heat production.
Other: Exercise at 36°C
Exercise at 22°C OTHER
Participants complete intermittent exercise at a metabolic heat production of 160 W/m² in an ambient temperature of 22°C (72°F).
Exercise at 26°C OTHER
Participants complete intermittent exercise at a metabolic heat production of 160 W/m² in an ambient temperature of 26°C (79°F).
Exercise at 31°C OTHER
Participants complete intermittent exercise at a metabolic heat production of 160 W/m² in an ambient temperature of 31°C (88°F).
Exercise at 36°C OTHER
Participants complete intermittent exercise at a metabolic heat production of 160 W/m² in an ambient temperature of 36°C (97°F).
Qué evalúan los investigadores
Estas medidas indican qué se estudia. No prueban que un tratamiento funcione.
Medidas principales
Core temperature
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Core temperature indexed by visceral (telemetry pill) temperature
Medidas secundarias
Evaporative heat loss
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Evaporative heat loss as assessed using a direct air calorimeter
Dry heat loss
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Dry heat loss as assessed using a direct air calorimeter
Whole-body total heat loss
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Total heat loss (evaporative + dry) as assessed using a direct air calorimeter
Body heat storage
Plazo: Change from start to end of exercise for each of the four 15 minutes exercise bouts
Heat stored in the body for each of the exercise bouts
Skin temperature
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Skin temperature measured at 8-sites (forehead, chest, scapula, upper arm, forearm, hand, thigh, calf) with mean value calculated as weighted values of 8 sites - forehead 7%, chest 17.5%, scapula 17.5%, upper arm 7%, forearm 7%, hand 5%, thigh 19%, and calf 20%.
Change in skin temperature
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Skin temperature measured at 8-sites (forehead, chest, scapula, upper arm, forearm, hand, thigh, calf) with mean value calculated as weighted values of 8 sites - forehead 7%, chest 17.5%, scapula 17.5%, upper arm 7%, forearm 7%, hand 5%, thigh 19%, and calf 20%.
Heart rate
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Heart rate measured continuously with chest-band telemetric device
Thermal sensation
Plazo: End of each of the four 15 minutes exercise bouts (average of last 5 minutes)
Thermal sensation will be assessed using the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 7-point scale ("0=neutral to 7=extremely hot")
Revisa las tablas completas y sus limitaciones en el registro oficial.
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1 centros
University of OttawaOttawa, Ontario, CanadaReclutando
Equipo y fechas
- Patrocinador principal
- University of Ottawa
- Inicio del estudio
- 19 jul 2026 Real
- Finalización primaria
- 30 abr 2027 Estimado
- Finalización del estudio
- 30 jun 2027 Estimado
- Primera publicación
- 24 ago 2026 Real
- Última actualización
- 10 nov 2026 Real
Contactos oficiales del estudio
Título oficial del estudio
Ambient Temperature and Thermoregulation During Moderate-Intensity Exercise in Children and Youth
Consulta a Wellness Clinical Research
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Fuente: API v2 de ClinicalTrials.gov. Patrocinadores e investigadores envían la información. La NLM no aprueba la seguridad ni la ciencia de todos los estudios registrados. Aviso del registro.
Consultado: 11 nov 2026 · Última actualización del registro: 10 nov 2026