How can I tell if I'm sleeping enough?
Ask the doctor
A growing body of data indicates that wearable fitness trackers, while not perfect, provide a fairly accurate way to assess sleep. Fitness trackers mainly use an accelerometer that detects movement, and thus sleep patterns. The information—including how many minutes you are awake and restless and when during the night they occur—is displayed as a graph on a smartphone, tablet, or computer.
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