Increasing age is a major risk factor for susceptibility to heat stress during physical activity

Appl Physiol Nutr Metab. 2017 Nov;42(11):1232-1235. doi: 10.1139/apnm-2017-0322. Epub 2017 Aug 24.


We evaluated the extent to which age, cardiorespiratory fitness, and body fat can independently determine whole-body heat loss (WBHL) in 87 otherwise healthy adults. We show that increasing age is a major predictor for decreasing WBHL in otherwise healthy adults (aged 20-70 years), accounting for 40% of the variation in the largest study to date. While greater body fat also had a minor detrimental impact on WBHL, there was no significant role for cardiorespiratory fitness.

Keywords: aging; body fat; cardiorespiratory fitness; condition cardiorespiratoire; exposition à la chaleur; gras corporel; heat exposure; older adults; personnes âgées; thermoregulation; thermorégulation; vieillissement.

MeSH terms

  • Adiposity
  • Adult
  • Aged
  • Aging*
  • Body Mass Index
  • Cardiorespiratory Fitness
  • Exercise*
  • Heat Stress Disorders / physiopathology*
  • Humans
  • Male
  • Middle Aged
  • Oxygen Consumption
  • Risk Factors
  • Young Adult