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Appl Physiol Nutr Metab. 2019 Jan;44(1):99-102. doi: 10.1139/apnm-2018-0211. Epub 2018 Jul 31.

Self-reported physical activity level does not alter whole-body total heat loss independently of aerobic fitness in young adults during exercise in the heat.

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Human and Environmental Physiological Research Unit, Faculty of Health Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada.


We evaluated whether self-reported physical activity (PA) level modulates whole-body total heat loss (WB-THL) as assessed using direct calorimetry in 10 young adults (aged 22 ± 3 years) matched for rate of peak oxygen consumption (an index for aerobic fitness), but of low and high self-reported PA, during 3 incremental cycling bouts (∼39%, 52%, and 64% peak oxygen consumption) in the heat (40 °C). We showed that level of self-reported PA does not appear to influence WB-THL independently of peak oxygen consumption.


calorimetry; calorimétrie; consommation d’oxygène de pointe; exercice physique; exercise; heat loss; niveau d’activité physique autorapporté; peak oxygen consumption; perte de chaleur; self-reported physical activity level

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