The context in this question is for cold weather where after a race, the athlete will cool down too fast , which may lead to hypothermia.
The idea is that the athlete is still warmer than surrounding, so with the silver sheet, it reflects the radiation back to the athlete and also reduce rate of emission of radiation to the surrounding, thus keeping the athlete warm.
Such practice is not applicable to Singapore's weather where it is hot and humid and you want to remove as much thermal energy as possible to prevent heat stroke.
Негізгі бет PP2022P1Q17 Why is the athlete wrapped with silver and white sheet after a run?
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