Climate change, a high prevalence of chronic diseases and alarming levels of physical inactivity are three of the central challenges we face in the 21st century.
The increased frequency, duration and intensity of heat waves is one of the undeniable signs that climate change is well underway. According to the various climate scenarios, by the end of the century between half and three-quarters of the world’s population will be exposed to lethal heat for more than 20 days per year.
The future impact of extreme heat events will depend on the extent of climate change, but also on our ability to adapt to it by becoming less sensitive and vulnerable to heat, and therefore more resilient. As researchers in physical activity science and environmental physiology, we are assessing how adopting an active lifestyle can make us better equipped to cope with rising global temperatures.
How can the human body combat heat?
When exposed to heat, the body deploys several responses to try to dissipate it. The first is conscious and depends on behavioural decisions we make to minimize exposure, such as seeking a cool place, switching on a fan or reducing our physical activity.
Secondly, if these strategies are not sufficient, the brain activates physiological responses that are beyond our control;…
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