Clocks And Rhythms (2025)

Your primary timekeeper is the , regulated by a "master clock" in the brain called the suprachiasmatic nucleus (SCN). This clock responds to external cues—primarily light and darkness —to signal when it’s time to be awake and when it’s time to sleep.

If you've been feeling groggy or "off," your rhythms might be "misaligned" due to late-night screen use, irregular meals, or caffeine. Here is how to reset: Clocks and rhythms

Mastering the Tick-Tock: A Guide to Your Body's Clocks and Rhythms Your primary timekeeper is the , regulated by

: Your brain performance and mood are directly tied to how well-rested and "in sync" you are. Your primary timekeeper is the