Guides

Circadian Rhythm

Sleep timing, light exposure, schedule alignment, and how circadian rhythm affects alertness and rest.

Your body clock influences when you feel sleepy, when you feel alert, and how well a changed schedule goes. This category covers light exposure, routine timing and schedule alignment for anyone who sleeps badly because their days and nights are out of step. It is small for now, with one core guide.

Where to start

Once you understand the timing basics, the sleep tips guide turns them into practical changes.