Category: Sleep
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How an inconsistent sleep schedule takes its toll on your body
Ultrahuman research suggests inconsistent sleep elevates heart rate and impacts recovery
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Why waking up at 3 AM could be your metabolism – and how to change it
Updated: If you find yourself waking at 3AM regularly, it could be your metabolism. Here’s what to watch out for
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Ultrahuman-powered smart pillow shown to transform pro-gamers’ sleep
The Tech Co Performance Pillow uses Ring AIR insights to promote REM sleep, reduce wake time, and help athletes get higher-quality rest
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What is your sleep chronotype and how it affects productivity
Discover your chronotype — Bear, Wolf, Lion, or Dolphin — and learn how it shapes sleep, focus, diet, and health. Align your routine with your biology
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How caffeine affects your sleep – and when you should stop drinking it
Discover how caffeine affects your sleep, from latency to REM disruption—plus science-backed tips for timing your intake without sacrificing rest.
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Why sleep is the hardest Tour De France stage to win
How Team Cofidis uses Ultrahuman Ring AIR to maximize recovery during the Tour de France
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Caffeine and adenosine: The reason behind the coffee crash
How caffeine affects adenosine signaling, sleep, and energy. Learn why crashes happen and how to reset your tolerance for better cognitive performance
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5 ways to supercharge your deep sleep
Learn why deep sleep matters, how much you need, and 5 science-backed ways to improve it — even as you age.
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Introducing Caffeine Window upgrade: Now with real-time tracking and logging
Caffeine Window got personal with effortless tagging, real-time body caffeine levels and adaptable cut-off times.