û 湮 ۵ȴ. ̼ , Ѵ ѿ ϴ Ȯ ־. ߱ ũ ̼ ʹ̼ Ѵ. ̼ 10 ũ⺸ , ʹ̼ ũⰡ 2.5 δ .
̼ ʹ̼ Ȳ꿰, 꿰, ϸϾ ̿ а ߱ݼ ̷ ִٴ ̴. Ư ũⰡ ſ ʹ̼ 쿡 ɷ ʰ ٷ ӿ Ǿ ȯ õ, ȯڿ ġ̴.̿ܿ ̼ ü ȭ ֹ Ȱ ȭƮ 索 ưȭ ȯ ɺ ȯ ȭų ִ. ̻Ӹ ƴϴ. ̼ ū ģ. ̱ б(University of Washington, Seattle) (Martha Billings) ̲ , ʹ̼ ϼ ȿ(sleep efficiency) ϱ Ÿ. ʹ̼ 踦 ˾Ƴ 5 ̱ 6 ÿ ù 1,863 ߴ. , ̼ ſ ϴ ȿ ũ Ҵ. Ư, ̻ȭҿ ȿ 60% ü ǥ Ѿ, ̼ ̻ ȿ ſ . "̻ȭҿ ̼ ɼ ſ " ߴ. "̼ ڿ κ ɿ ǿ ֱ , ߺ ų ִ" ߴ.
̼ غ
ѹα ̼ 躸DZⱸ(WHO, World health organization) ǰ 3 ̸̻, ε ڰ þ ִ. ̴ ä ̼ غϴ ִ Ҹ Ұߴ. ƿ̼ ִ ߱ݼ صϴ ش. , Ǿ ִ. Ƿ긮Ƿ긮 ӿ ʼ ƹ̳ Ÿ, ̳ dzϰ ִ. ̼ ȭ ڽþƴ ص ־, ü ̼ ش. ö̵ ױۿ پ õ Ҹ ö̵ ϰ äҿ ִ. ǥ ݸ, ڻ, , Ǹ, 纣 ִ.
= ̴ ä
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