Why Do I Keep Waking Up at 4 AM?
Why do I keep waking up at 4 AM? The common causes, from stress hormones and alcohol to sleep apnea, and what to do when you wake up.
Tag circadian rhythm
Night Shift Sleep: How to Use Light, Sunglasses and Blackout Curtains
A light plan for night shift workers: bright light at work, dark sunglasses on the way home and a blackout bedroom, based on night-shift studies.