There are many reasons for picking up one of the best Fitbits, and for a lot of people those reasons include being able to track their sleep. Strap a Fitbit smartwatch or tracker to your wrist and it'll monitor your slumber, recording the amount of time you're asleep as well as the quality of the sleep you're getting. If you want to know how to track sleep using your Fitbit, we'll explain how it works here'the hardware you need, and the options you've got in the accompanying Fitbit app. The good news is, a lot of the hard work is done for you: Just by wearing a Fitbit at bedtime you're well on the way to collecting some useful sleep data. Every Fitbit out there can track your sleep in terms of how long it lasts, and every Fitbit with a heart rate monitor'which is all of the newer devices launched in the last few years'can also figure out the differences between sleep stages. Fitbits with heart rate monitors can discern between light sleep, deep sleep, and REM sleep, when vivid...
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