Sleep Debt
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Sleep debt is the accumulated shortfall between the sleep a person needs and the sleep they obtain.
Show
Six hours a night across a workweek produces a shortfall that a long Saturday does not fully repay.
Watch for
Sleep debt accumulates faster than it is repaid, and self-rated alertness recovers before performance does.