😴Sleep Debt Calculator
Adults: 7-9 hrs
Sleep debt is the cumulative effect of insufficient sleep. Each hour of sleep deficit impairs cognitive performance, mood, and physical health. The brain does not fully "forget" sleep debt — it accumulates across weeks.
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Did You Know?
Matthew Walker's research shows that sleeping 6 hours per night for two weeks produces the same cognitive impairment as 24 hours of total sleep deprivation — yet most people feel "fine" after a week of 6-hour nights.
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