More Sleep Could Make You Less Injury-Prone That’s likely because, if you’re not moving and your heart rate is low, the devices-which typically use an accelerometer to detect movement and a light-based sensor to detect heart rate-have a harder time determining whether you’re actually awake or asleep. “However, if you’re in bed trying to sleep but still awake, they’ll only perform at a medium level of accuracy.” What that really means is “if you’re asleep, most these devices are going to correctly determine-with 90 to 95 percent accuracy-that you are indeed asleep,” says the Sleep study author Evan Chinoy, a sleep research scientist at the Naval Health Research Center in San Diego, CA.
#SLEEP TRACKER BAND SERIES#
The Apple Watch Series 3 and Garmin Vivosmart 4 fell at the other end of the spectrum.
They found that all of the devices except the Garmin performed as well as or better than actigraphy on sleep/wake performance measures.Īdditional research published in the Nature & Science of Sleep Journal in October 2020 found that the Fitbit Ionic and the Oura Smart Ring possessed the lowest degrees of error in sleep tracking compared to an electroencephalography (EEG)-based device as well as other wrist-based trackers, including the Beddit Sleep Monitor 3.0, Fatigue Science Readiband, Polar A370, and WHOOP Strap 2.0. The gold-standard sleep assessment technique, polysomnography (PSG), isn’t possible outside of a laboratory or clinic, so researchers compared the results of four wearable sleep-tracking devices (Fatigue Science Readiband, Fitbit Alta HR, Garmin Fenix 5S, Garmin Vivosmart 3) and three non-wearable (EarlySense Live, ResMed S+, SleepScore Max) sleep-tracking devices against the mobile sleep assessment standard, actigraphy.
But are these devices even accurate? It depends on the device you’re using, a December 2020 study published in the journal Sleep found. What Happened When I Tried a Sleep CalculatorĪ good night’s sleep is so crucial to exercise recovery and performance that the sleep tracking wearable business is booming sales are projected to grow 15.8 percent per year between 20, according to market reports.
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