Medical Xpress July 23, 2025
It is impossible to imagine life without the smartwatch for a huge group of people. About 455 million consumers worldwide used a smartwatch in 2024. They are especially popular among young adults (18–34 years old); in this age group, about 40% use a smartwatch.
Among other things, the smartwatch measures your heart rate and, based on biometric data, gives you information about how well you sleep, how tired or how stressed you are. But especially for the latter two topics, fatigue and stress, new research shows that it is questionable whether smartwatches are accurate.
Smartwatch vs. self-reporting
The research team of Eiko Fried, led by Björn Siepe, investigated the use of wearable sensor data (from smartwatches) alongside smartphone-based self-reporting (EMA,...
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