Sleep is an essential function1 that allows your body and mind to recharge, leaving you refreshed and alert when you wake up. Healthy sleep also helps the body remain healthy and stave off diseases. Without enough sleep, the brain cannot function properly.
What is the exact reason for sleep?
The energy conservation theory of sleep suggests that a main purpose of sleep is to reduce a person's energy use during times of the day and night, when it's inconvenient and less efficient to hunt for food.
What are the 5 reasons we sleep?
For now, here are five of the most interesting ideas about why humans sleep:
- 1) Sleep clears our brains of junk.
- 2) Sleep strengthens our memories.
- 3) Sleep restores our bodies.
- 4) Sleep conserves energy.
- 5) Sleep helped us hide from predators.
