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How Your Body Adapts to Changing Temperatures
How does the body adapt to seasonal temperature changes?
Spending most of your time indoors in the air conditioning might slow the body’s changes, come summer. “But if we spend time outside exercising, or even just being physically active outdoors, we’ll adapt to those conditions,” Périard says.
When you go for a walk on a hot summer day, before you’ve adapted to the heat, both your skin temperature and your core temperature may go up. That sets off alarms in the body, announcing heat stress. “With that, we trigger lots of sweating, and we increase our skin blood flow,” says Périard. Sweat evaporates from the skin, cooling skin down, and blood sent to the surface of the body helps shed heat.
The volume of blood pumping through the body also goes up. More blood volume allows more heat to be shed and supports greater sweating without dehydration. There are also changes at the level of the cell, with some proteins’ production going up to protect normal functioning in greater heat. The process of reaching a fully adapted state might take a few weeks, although the precise details will depend on the situation.
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