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

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


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.

Keywords: 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.

MeSH terms

  • Adolescent
  • Adult
  • Age Factors
  • Bicycling
  • Body Temperature Regulation*
  • Calorimetry
  • Exercise / physiology*
  • Female
  • Hot Temperature*
  • Humans
  • Male
  • Oxygen Consumption
  • Physical Fitness*
  • Self Report*
  • Time Factors
  • Young Adult