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Fitbit sleep data: Sleeping more than 7 hours is good for you

Your mom was right. Sleep early, sleep longer. Sleeping longer leads to more deep and REM sleep, which is vital for general well-being. Fitbit recently conducted a sleep study using its trackers like Fitbit Alta HR, Fitbit Blaze and Fitbit Charge 2. Results were scored independently by polysomnography technicians, a testament of the accuracy of these wrist-worn devices for gathering reliable sleep data.

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