Blood oxygen levels refer to the amount of oxygen circulating in the blood. Normal blood oxygen levels fall between 75 and 100 millimeters of mercury (mm Hg) on arterial blood gas (ABG) test results.

Apple has your health in mind when it comes to the Apple Watch, which is why it added a blood oxygen sensor starting with the Series 6. This technology can tell if you’re getting enough oxygen to your ...

Fitbit’s new Charge 4 fitness band can now display blood oxygen saturation levels while you sleep. The new SpO2 monitor feature tracks your blood oxygen levels when sleeping, and the data can be ...