Page 7 - Fitbit Inc News Today : Breaking News, Live Updates & Top Stories | Vimarsana

The development of consumer sleep-tracking technologies has outpaced the scientific evaluation of their accuracy. In this study, five consumer sleep-tracking devices, research-grade actigraphy, and polysomnography were used simultaneously to monitor the overnight sleep of fifty-three young adults in the lab for one night. Biases and limits of agreement were assessed to determine how sleep stage estimates for each device and research-grade actigraphy differed from polysomnography-derived measures. Every device, except the Garmin Vivosmart, was able to estimate total sleep time comparably to research-grade actigraphy. All devices overestimated nights with shorter wake times and underestimated nights with longer wake times. For light sleep, absolute bias was low for the Fitbit Inspire and Fitbit Versa. The Withings Mat and Garmin Vivosmart overestimated shorter light sleep and underestimated longer light sleep. The Oura Ring underestimated light sleep of any duration. For deep sleep, bias

San franciscoUnited statesIssy les moulineauxFrance generalPhillips respironicsGarmin vivosmartPhillips actiwatchFitbit incFitbit inspire hr incGarmin ltdWithings sleep tracking mat incOura incAmerican academy of sleep medicineUniversity of massachusettsInstitutional review boardEveningness questionnaire