NapTime

Remember nap time when you were a small child? You might still need an afternoon nap to refresh you.Sleep researchers cite the "midday trough" -- the period between 1 p.m. and 4 p.m. -- as when people lose energy and feel sleepy. This time period also has a significantly higher number of industrial and traffic accidents than at other times. A parallel trough occurs between 1 a.m. and 4 a.m., when humans are most likely to die.Many countries in Europe and South America have a leisurely lunch followed by a rest before returning to their business schedules. Maybe in the on-the-go United States, we need to take a break.