Sleepiness A recent poll by the National Sleep Foundation indicates about 63 percent of American adults don't get the recommended eight hours of sleep a night.
Lack of sleep can interfere with alertness and mood.
Roughly half of all workers say daytime sleepiness interferes with their ability to perform job duties. Sleepy workers can have trouble with concentration, handling stress, solving problems, and making decisions. In a survey last year, the National Sleep Foundation found 27 percent of adults are sleepy at work on two or more days of the week. About eight percent of workers report falling asleep at work at least occasionally. Nineteen percent report occasional or frequent work errors due to daytime sleepiness.