Your body normally has some of the adenosine receptors activated by adenosine, even if you are fully rested. They are a natural part of the body’s self-regulatory system. If you flood your system with caffeine and remove what little adenosine is on the receptors, then it dials the body state further than “well rested.”
Have you ever been physically tired but not mentally.
This is the opposite. It helps by telling your body it isnt time to sleep yet because the coffee made your body clock move back even though it isnt actually recovered.
Coffee is tricking your body into thinking its rested when its not, while it may actually still need a lot of sleep.
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