Guide
Why "10 metres water-resistant" is not enough for swimming with a watch
by David Lee
"Too hot for you? Too hot? Then drink!"
27.6.2019
Translation: machine translated
Why buying energy-guzzling air conditioners or useless fans is just a helpless attempt to satisfy short-term physical needs through consumption: CIO Oliver Herren presents the only real tips to beat the heat in this business-busting article.
Since so many people are complaining about the high temperatures and we're selling fans and air conditioners en masse, I wanted to find out more about what can be done to combat the heat.
The physics behind it
How do you cool down a body in the heat? With evaporation! It's as simple as that, even with a human body. If you are too hot, you simply evaporate too little liquid. So you can easily cool yourself down by drinking more and living with the fact that you're sweating. Of course, there are limits, but they are not below 40° Celsius, but above.
Note that water consumption can actually increase considerably if you exert yourself in the heat.
Maybe someone has already tested this extensively? Yes, the American military has. Here are various studies on the topic that are quite interesting.
Water requirement during exertion in the heat
Water requirements during exercise in the heat depend on fluid loss through sweating. The sweating rate is proportional to the metabolic rate and can be 3 to 4 litres per hour or up to 10 litres per day.
Exercise and heat acclimatisation can increase the sweating rate by 10 to 20 per cent, or 200 to 300 ml per hour.
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This means you really need to drink more than when it's cool. The differences are big. And you can train your cooling capacity.
The influence of water temperature and drinking on sweating after rehydration
When dehydrated individuals drink water of different temperatures, the sweating response is influenced by both the water temperature and the volume of intake. The sweating behaviour of cold water differs significantly compared to other water temperatures. The water temperature of 16° C, as in cool tap water, is optimal for the absorption of moisture in dehydrated people.
Mild dehydration impairs cognitive performance and mood in men
Yes, it's just as the title suggests: If you don't take in enough water, both your performance and your mood will decline . Source
Drink water and nothing else
Water, drinks with few or no calories, even cold coffee - anything is better than soft drinks. Sugar dehydrates the body and leads to a coating on the tongue and teeth. Sweet drinks are refreshing because they satisfy the craving for sugar - not quench your thirst.
Oliver Herren
Chief Innovation Officer
Oliver.Herren@digitecgalaxus.chCool: Creating interfaces between the real world and the world of pure information. Not cool: Driving by car to the mall to shop. My life happens online, the information age is where I feel at home.
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