health
Do we really need eight hours sleep a night
We’re told that sleep is a superpower, making us smarter, healthier and happier. But how much is enough? And is insomnia as bad for us as we think?
TL;DR
- Chronic sleep deprivation is a risk factor for dementia, cardiovascular disease, stroke, and weakened immune systems.
- The recommended seven to eight hours of sleep is an average and not a strict requirement for everyone.
- Individual sleep needs are influenced by genetics; feeling alert and functional is a key indicator of adequate sleep.
- Insomnia is a distinct condition from sleep deprivation, with different health consequences, and many insomniacs perceive their sleep as shorter than it actually is.
- A single night of poor sleep has limited long-term impact due to the brain's capacity to compensate.
- Catching up on sleep during weekends can help but may disrupt natural circadian rhythms.
- Prioritizing sleep by creating a conducive sleep environment (e.g., blackout curtains, earplugs) is important.
- Occasional all-nighters for highly task-oriented projects can be beneficial but should be avoided before demanding social interactions or driving.