The brain and body tend to treat an intense sporting competition as an emergency, sending the heart racing, blood pressure skyrocketing, and stress hormones spiking in a fight-or-flight response.

我们的大脑和身体会把一场激烈的比赛当成一个紧急事件，然后心跳就会加速，血压猛涨，肾上腺素作出急性应激反应。

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This stress can overload the cardiovascular system, triggering a very real emergency.

这种应激反应会使心血管系统过载，然后引发真正的紧急情况。

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That is quite different, officials stress, from the emergency rescues of Belarus, Latvia, Hungary, Romania, Serbia and Ukraine.

来自白俄罗斯，拉脱维亚，匈牙利，罗马尼亚，塞尔维亚和乌克兰的应急救援组织官员称这一举动非同寻常。

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Researchers think that raised stress levels help people cope with the emergency but, over days and weeks, prevent them from learning new information and remembering it.

ECONOMIST: The ageing brain