Sleep

If you travel often, the fastest way to protect your sleep is to control light, timing, and your sleeping environment. This guide shows frequent...

Circadian rhythms are the body’s 24-hour programs for sleep, alertness, body temperature, hormone secretion, and metabolism. They’re coordinated by a master clock in the...

Progressive muscle relaxation (PMR) is a simple, evidence-based technique where you deliberately tense and then release muscle groups in a set order to trigger...

Nighttime screen use doesn’t just “feel” stimulating—it can biologically delay sleep. In short: light from screens, especially short-wavelength (blue-enriched) light, activates special retinal cells...

A quieter, darker, tech-light bedroom is one of the fastest ways to sleep better. Put simply: remove devices that add light, noise, notifications, or...

Blue light affects sleep quality because your eyes contain melanopsin-sensitive cells that tell the brain when it’s “daytime.” Short-wavelength (blue-rich) light in the evening...

Cognitive Behavioral Therapy for Insomnia (CBT-I) is a short, structured program that retrains your brain and body to sleep more efficiently by changing what...

Babies don’t keep the same nap routine for long. As the brain’s sleep–wake systems mature, the nap schedule by age shifts in predictable steps:...

A great power nap isn’t guesswork—it’s timing. In this guide, you’ll learn exactly how long to nap (10, 20, 30, 45, 60, 90, or...

Light is the master time cue for your body’s internal 24-hour rhythm. In simple terms, light resets your circadian clock by signaling special retinal...