How to use your Fitbit to monitor your blood oxygen levels

Earlier this month, Fitbit quietly rolled out blood oxygen monitoring to five of its devices: the Versa, Versa 2, Versa Lite, Ionic, and Charge 3. (Interestingly, this is a feature that Apple said its Apple Watch is capable of doing, but which has yet to be released for that device.)

Why is this important? Because your blood oxygen levels indicate how well oxygen is distributed throughout your body, which is important for making sure your organs are functioning properly.

Monitoring your oxygen levels is helpful during both exercise (to see how your body adjusts during an intense HIIT workout or a long hike, for example) and sleep (when it could help with early detection of underlying health issues). So far, Fitbit has only made blood...

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