In fact, in a University of Chicago study, healthy young men who got only four hours of sleep on six consecutive nights began to show signs of medical problems usually associated with senior citizens.
ففي دراسة اجرتها جامعة شيكاڠو ،‏ طُلب من شبان اصحاء ان يناموا اربع ساعات فقط طوال ست ليال متتالية .‏