system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Does laying in bed resting before you sleep actually do anything to rejuvinate your body for the upcoming day?
gpt
Sleep is mostly important to renew the brain neurotransmitters and do some housekeeping around the brain. When you think about it, sleep is mostly about shutting down your consciousness. We are only starting to understand what really happens in the brain during sleep.

Conclusion: laying in bed is rejuvenating your body without doing much for your brain.