Clear, sourced guidance on food, movement, sleep and stress — free to read.
Category · 76 articles
How sleep works, how much you need at every age, why it matters for body and mind, and what actually helps when it goes wrong, from insomnia and sleep apnea to shift work and jet lag. Written for adults in the US who want to sleep better or help someone they care for.
25 min read Read the complete guide
Ten to twenty minutes improves alertness; thirty to sixty can leave you groggy, and late naps use up the sleep pressure you need that night. Key takea...
Continue Reading : Napping: What Published Guidance Supports
Ten to twenty minutes improves alertness; thirty to sixty can leave you groggy, and late naps use up the sleep pressure you need that night. Key takea...
Continue Reading : Why Napping Matters, Explained Simply
Short daytime sleep, and how its length and timing change whether it helps or hinders. Ten to twenty minutes improves alertness; thirty to sixty can l...
Continue Reading : Napping: The Practical To-Do List
Ten to twenty minutes improves alertness; thirty to sixty can leave you groggy, and late naps use up the sleep pressure you need that night. Key takea...
Continue Reading : Myths About Napping, Checked Against the Guidance
Short daytime sleep, and how its length and timing change whether it helps or hinders. Key takeaways Short nap for alertness: 10-20 minutes Length tha...
Continue Reading : Napping: A Beginner-Friendly Start
Short daytime sleep, and how its length and timing change whether it helps or hinders. Key takeaways Short nap for alertness: 10-20 minutes Length tha...
Continue Reading : Answers to the Common Questions on Napping
Short daytime sleep, and how its length and timing change whether it helps or hinders. Key takeaways Short nap for alertness: 10-20 minutes Length tha...
Continue Reading : The Short Guide to Napping
Light timing sets it, which makes morning daylight one of the most powerful and least used sleep tools available. Key takeaways Strongest signal: ligh...
Continue Reading : The Body Clock: Sorting the Evidence From the Noise
Light timing sets it, which makes morning daylight one of the most powerful and least used sleep tools available. Key takeaways Strongest signal: ligh...
Continue Reading : Understanding The Body Clock: A Plain-English Explainer The roughly 24-hour internal rhythm that sets when you feel alert and when you feel sleepy. Light timing sets it, which makes morning daylight one of...
Continue Reading : The Body Clock: The Practical To-Do List Light timing sets it, which makes morning daylight one of the most powerful and least used sleep tools available. Key takeaways Strongest signal: ligh...
Continue Reading : What People Get Wrong About The Body Clock The roughly 24-hour internal rhythm that sets when you feel alert and when you feel sleepy. Key takeaways Strongest signal: light, particularly in the...
Continue Reading : The Body Clock for Beginners: Where to Start The roughly 24-hour internal rhythm that sets when you feel alert and when you feel sleepy. Key takeaways Strongest signal: light, particularly in the...
Continue Reading : Answers to the Common Questions on The Body Clock The roughly 24-hour internal rhythm that sets when you feel alert and when you feel sleepy. Key takeaways Strongest signal: light, particularly in the...
Continue Reading : The Body Clock: The Quick Reference It is the part of sleep advice people fix first and the part that matters least on its own: necessary, rarely sufficient. Key takeaways Temperature: c...
Continue Reading : The Sleep Environment: What Published Guidance Supports