Not a sleep expert, but your brain and body both need sleep to perform maintenance functions that cannot be performed while awake.
Your brain processes memories and stores them in long-term memory storage. It also clenses itself of toxins that build up while you’re awake.
Neurons and nerve cells organise themselves and communicate which supports healthy brain function.
The body repairs damaged cells, releases hormones and proteins, and restores energy.
Think of it like performing maintenance on a highway bridge. Limited maintenance can be performed while the bridge is open, but to perform in depth and proper maintenance, the bridge needs to be closed to traffic so the crews can work on all of it at once.
Sleep alone isn’t enough to allow the maintenance to occur, it has to be the right amount and quality of sleep to get the full benefit. Imagine the bridge repair crew having to stop their work every 30 minutes to allow a few vehicles through, it would impact the efficiency and quality of their work.
That is where the 6 hours of uninterrupted sleep figure comes from. The bridge repair crew needs the bridge closed for 6 hours to perform the maintenance work and have it ready for traffic in the morning.
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