What better saves from the heat: hot tea or ice cream

Scientists confirm the view that hot drinks will help cool down on a hot summer day better than refreshments. The corresponding study was conducted by scientists from the University of Ottawa (Canada), writes The Globe and Mail.

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During the course of the study, participants had to complete a series of cycling rides periodically drinking water of varying temperatures (between 1,5 and 50 degrees Celsius). Changes in their temperature were monitored using nine different thermometers.

Scientists have found that hot liquid helps to more effectively deal with overheating. It raises the body temperature somewhat, but also makes it sweat more abundantly. Once outside, the sweat evaporates, which contributes to cooling. The researchers note that this effect compensates for a slight increase in temperature from drinking a hot liquid.

“Yes, a hot drink raises your temperature, but increased sweating (if the sweat evaporates) more than compensates for the rise in temperature caused by fluid intake,” says study author Ollie Jay.

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Jay’s view is shared by Australian thermoregulation expert from the University of Sydney Christopher Gordon.

“Although people often feel hotter when they drink a hot drink, they then feel cooler when they sweat,” he notes.

Professor Peter McNaughton from the University of Cambridge explained that this effect is associated with the reaction of certain receptors located in the mouth and upper digestive tract. In response to a hot drink, they send signals to the brain, causing it to actively fight the temperature increase through sweating.

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And if drinking hot liquid makes a person sweat more, cooling in this way, then cold drinks have the opposite effect. They slightly reduce body temperature, but at the same time reduce sweating, therefore, the cooling effect is not so strong.

“Cold drinks chill for a moment. Because their volume is quite small on an organism-wide scale, the cooling effect disappears very quickly,” explained McNaughton.

For a hot drink to have a cooling effect, sweat must evaporate. According to Ollie Jay, on a hot day in conditions of high humidity, sweat is too much. And if it does not evaporate, then a cup of tea may be superfluous.

“If the sweat is just dripping onto the ground, it’s better to drink a cold drink,” Jay emphasized.

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