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Evidence-based articles on sleep, activity, wellbeing and productivity — and what the data really says.

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Wellbeing

How to Find Out What's Really Affecting Your Mood (Without Guessing)

Bad days feel random until you actually look at the data. Here's how to find the real pattern behind your mood swings instead of blaming "just one of those days."

Aug 29, 2026
How to Find Out What's Really Affecting Your Sleep in 7 Days
Sleep

How to Find Out What's Really Affecting Your Sleep in 7 Days

You can't feel the cause of a bad night, it's usually something from eight hours earlier. Here's a seven day method to catch it, using nothing but your phone.

Jun 23, 2026
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