Sleep patterns in these groups were tracked with wrist devices that measure a person's activity levels. (sciencenews.org)
That's exactly where the Garmin Vivofit activity tracker is aimed: a wearable wrist device able to track your... Read more (pocket-lint.com)
The students wore wrist devices that monitored their movements, to assess whether they had periods of wakefulness after they had fallen asleep. (scientificamerican.com)