Wearable TechBiomarkersSleep 1 MIN READ

Introducing Nap Detection V2: Find your unique rest signature

Written by Team Ultrahuman

Apr 11, 2025
Nap Detection V2

Nap detection is crucial for understanding your body’s recovery patterns – whether you’re catching up on sleep debt, recharging after an intense workout, or maintaining energy through strategic rest.

Accurately detecting these restorative moments helps move from just data to actionable health insights that are tuned to your physiology in real-time.

Our new ML-based algorithm, trained on over 1 million de-identified and anonymous naps, now detects naps with even greater precision. Every recovery insight you receive is now more reliable than ever before.

Dive in to see how it works.

What’s new? 

Smarter detection

The algorithm now distinguishes between true naps and passive activities where you might be more stationary, such as reading or watching TV. By combining complex patterns from markers such as heart rate, HRV, temperature, and movement, your Ring AIR identifies genuine rest periods.

Enhanced recovery insights

Each verified nap seamlessly integrates into your Sleep Score, Dynamic Recovery, and Sleep Debt calculations, providing a complete picture of your daily rest and recovery patterns. With real-time and dynamic updates to your body’s dashboard, you’re in more control of when to push yourself harder or when you need a pause. 

The science behind it

Nap detection V2 algo analyzes thousands of physiological markers and was trained on over one million anonymous naps to understand your unique rest pattern.

The way you rest could have a particular type of HR, HRV, Temperature and motion pattern. This approach segregates other restoration activities from a nap. 

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