Just three sleepless nights could be enough to strain your heart

Health & Fitness
28 May 2025 • 6:19 PM MYT
The Independent
The Independent

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  • A new study from Uppsala University in Sweden reveals that just three nights of restricted sleep (around four hours) can trigger changes in the blood that are linked to a higher risk of heart disease.
  • Researchers found that sleep deprivation caused a rise in inflammatory markers in the blood, which can damage blood vessels and raise the risk of heart failure, coronary heart disease, and irregular heartbeat.
  • The study involved 16 healthy young men who underwent periods of normal sleep (8.5 hours) and sleep restriction (4.25 hours) in a controlled lab setting.
  • Exercise-induced boosts in healthy proteins like interleukin-6 and BDNF were weaker after poor sleep, indicating that sleep deprivation can diminish the cardiovascular benefits of physical activity.
  • The study showed that even short-term sleep deprivation can have significant negative impacts on cardiovascular health.

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