How daylight saving time affects our bodies, minds -- and world | Sleeping with Science

Transcriber: TED Translators Admin Reviewer:

Did you know that there is a global experiment performed

翻訳: Louwee Shibata 校正: Maki Sugimoto

75カ国 約16億人もの人々が

on approximately 1.6 billion people

年２回 経験する地球規模の実験が

across 75 countries twice a year?

あることをご存知でしょうか？

It’s called daylight saving time.

それは「夏時間」です

[Sleeping with Science]

[睡眠の科学]

The sleep-associated consequences are more significant than you may realize.

睡眠に関する影響は想像以上に大きいです

For example in the spring,

when we lose one hour of sleep,

there is a subsequent 24 percent relative increase in heart attacks.

In contrast, in the fall --

in the autumn,

睡眠が１時間増える秋には

when we gain an hour of sleep,

there is a 21 percent reduction in heart attacks.

心不全のリスクが21%減少します

Isn’t that incredible?

信じ難いですね

And I should also note

特に注目なのは

that we see similar changes in things such as road traffic accidents,

同様の変化が交通事故や脳卒中

strokes

and, tragically, suicide rates as well.

自殺率の減少にもみられます

In fact, even the economy suffers

実際に経済にも打撃を与え

with certain stock market returns taking a downswing

特定の株式市場のリターンの下落が

following the shift to daylight saving time

夏時間への移行とそれに伴う

and that one hour of lost sleep.

１時間の睡眠不足で生じます

This is how fragile our brains,

このように睡眠不足は

our bodies

私たちの脳や体

and even our societies are

そして社会をも

when it comes to sleep loss.

もろくしてしまいます。

But said more positively,

ところが逆に

even just small increases in sleep

睡眠をすこし長くとれば

can have immediate as well as long-term health benefits.

すぐ長期的な健康効果が得られます

So rather than thinking of sleep as a cost,

睡眠をコストと考えるのではなく

we can instead think of sleep

睡眠を最高の投資のひとつに

as one of the very best investments we can make.

考えることもできるのです