When Fitbit launched the Charge 4 fitness band, one of the features we found the most interesting was its ability to estimate users' blood oxygen saturation levels through its SpO2 monitor. Users ...

Mercey Livingston is a health and wellness writer and certified Integrative Nutrition Health Coach. She's written about fitness and wellness for Well+Good, Women's Health, Business Insider, and ...

Put simply, SpO2 is a measure of blood oxygen saturation. The more oxygen you have in your blood, the higher your SpO2 levels are going to be. Seeing as our bodies need oxygen to survive, we can ...