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英文字幕：

Ten years of training. One last point.

Hi, I'm Dr Greg Wells. If you think beach volleyball is nothing but fun in the sun - you'd be wrong. It's a fast and intense sport. During a match, athletes will sweat up to an astonishing 1.4 LITRES of fluids. Dehydration is a big issue. It can cause muscles to flame out and fail, so managing internal heat is crucial -and beach players do it in the coolest of ways. They increase their skins' capillarisation, which means they literally grow more blood vessels. This lets them shuttle heat away from the working muscles, and send it out to the skin -where sweat evaporates to cool the body. They mutate their bodies to beat the heat. It's like a chameleon changing colour to protect itself from predators.

Plus the speed is ridiculous! The time between when the ball is spiked to when they respond is almost instantaneous. The brain is collecting data on player position, wind, and how the attacker's arm is swinging. All this data is processed by the Parietal and Temporal lobes of the brain. They warn the frontal cortex. Signals fly through the nervous system at 70 metres per second.

Cool down adaptation... And lightning fast reaction times. That's how you spike to gold!

中文字幕：

十年的訓(xùn)練，最后一分的爭奪。

我是維爾斯博士。如果您以為沙灘排球只是陽光下的游戲，您就錯(cuò)了。這是快速強(qiáng)勁的運(yùn)動(dòng)。在比賽時(shí)選手排汗量竟達(dá)1.4 公升，脫水是個(gè)嚴(yán)重問題，可導(dǎo)致肌肉燃燒衰竭，所以控制體內(nèi)溫度至關(guān)重要。沙灘排球選手有最巧妙的辦法，他們提高皮膚的毛細(xì)血管化，也就是真的長出更多血管，這樣可以把熱能從運(yùn)動(dòng)中的肌肉輸出到皮膚，在那里汗水蒸發(fā)可使身體降溫。他們改變身體來克服熱的問題，就像變色龍改變顏色來抵抗天敵。

球賽的速度也很驚人。一方的擊球和另一方的反應(yīng)幾乎是同時(shí)進(jìn)行的。大腦收集數(shù)據(jù)，包括球員位置、風(fēng)向風(fēng)力、以及攻手如何揮臂。這些資料都在大腦的頂葉和顳葉分析處理，向額葉皮質(zhì)發(fā)出警告，訊號(hào)以每秒70米的速度在神經(jīng)系統(tǒng)傳送。

降溫機(jī)制，閃電般的反應(yīng)速度，就是一擊奪金的秘訣。

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（Video provided by GE 編輯：Julie）