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2w ago

New Meta-Analysis Shows Sleep Duration Linked to Higher Mortality Outside Seven-to-Eight-Hour Window

Researchers warn that extended sleep may signal undiagnosed conditions, urging better sleep hygiene to lower mental and cardiovascular risks.

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What Happens To Your Body When You Get Only 5-6 Hours of Sleep

Overview

  • Semmelweis University’s July 1 meta-analysis of 80 studies involving over two million participants confirms a U-shaped relationship between nightly sleep duration and mortality.
  • Sleeping more than nine hours per night is associated with a 34% higher risk of death compared to those in the optimal sleep range.
  • Getting fewer than seven hours of sleep raises mortality risk by 14%, reinforcing the importance of sufficient rest.
  • NHS and Heart Research UK experts advise aligning sleep routines with seven to eight hours per night and adopting consistent sleep hygiene practices.
  • Researchers stress that long sleep durations may reflect underlying health issues and call for personalized monitoring and further study of specific causes of death.