This One Sleep Mistake Is Destroying Millions of People

Why Consistency Matters More Than Duration

This is the insight that surprises most people: the research suggests that the consistency of your sleep schedule may matter as much or more than the total hours you sleep. A person sleeping seven hours on a consistent schedule outperforms, on most health measures, a person sleeping eight hours on a wildly variable schedule. The body’s circadian clock is extraordinarily precise and sensitive




it optimizes hormonal secretion, cellular repair, immune activity, and cognitive consolidation around expected timing. Disrupting that timing repeatedly prevents these processes from being optimally executed.