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:

Ever feel like your body has a mind of its own? One day you're a morning lark, ready to conquer the world at dawn; the next, you're a night owl, most productive when the rest of the world is asleep. This isn't just a quirk of personality; it's the work of your —your body’s internal 24-hour clock.

When your internal clocks are ticking in unison, your body functions like a well-oiled machine: