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Understanding Sleep Cycles: What Happens Every 90 Minutes
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Understanding Sleep Cycles: What Happens Every 90 Minutes

Learn what actually happens in your brain and body every 90 minutes while you sleep. Once you understand the cycle, timing your sleep and wake-up gets a lot easier.

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Browse by topicSleep FundamentalsBedroom & EnvironmentHabits & RoutinesSleep Tools & ComparisonsTroubleshooting Sleep

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More on Habits & Routines

Daily habits and routines that shape how well you sleep at night.

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How to Build a Wind-Down Routine That Actually Sticks
Habits & Routines 8 min read

How to Build a Wind-Down Routine That Actually Sticks

A wind-down routine only works if you can actually keep doing it, night after night. This guide walks through how to build one that fits your real life instead of an idealized version of it.

Long reads

Why You Wake Up at 3 AM and How to Fall Back Asleep
Troubleshooting Sleep8 min read

Why You Wake Up at 3 AM and How to Fall Back Asleep

Waking up at the same time every night isn't random, it usually points to something specific happening in your sleep cycle or daily habits. Here's what tends to cause it and how to fall back asleep faster.

More on Sleep Tools & Comparisons

Honest comparisons of sleep products and methods, so you can pick what actually fits your needs.

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Plain Language Writing

We explain sleep topics the way we'd explain them to a friend, without dressing simple ideas up in technical terms.

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Named Sources Only

Every study or expert we reference is named and linked, never an anonymous 'experts say' claim.

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Small Independent Team

A handful of writers and editors run this site, so every article gets real attention instead of being churned out at scale.

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Reader-Suggested Topics

Many of our best articles started as a question a reader emailed us, and we're always open to more.

Questions readers ask

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A small in-house team of writers and editors, each with a public bio on the site. We don't use anonymous or freelance-farmed content, and every article names who wrote and reviewed it.

How often do you publish new articles?

We keep a steady weekly schedule rather than posting in bursts. If a topic needs more research time, we'd rather delay it a week than rush something out.

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Readers can flag anything that looks off through our contact form, and we review it within a 30 day window. If a correction is needed, we update the article and note the change.

How do you verify the sources you cite?

We link directly to the study, report, or interview behind a claim whenever possible, and a second editor checks that the source actually says what we say it says before publishing.

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