One of the most important metrics on a Fitbit tracker is the Estimated Oxygen Variation – and now that every tracker is fitted with an SpO2 sensor, everyone can take advantage. Blood oxygen can be ...

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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.

Dizziness and severe shortage of breath is a pretty sure sign of overexertion, but sometimes you won't know you've pushed yourself too far until you're hunched over the park bench gasping for air. The ...

Sarah Mitroff has worn many hats at CNET, including Senior Mobile Editor and Managing Editor of Health and Wellness. Currently, she is a freelance editor. Throughout her career, she's written about ...

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 ...

Apple has been selling the Apple Watch Series 9 and Apple Watch Ultra 2 without the blood oxygen monitoring feature in the U.S. since mid-January, and while we've suspected Apple would be able to ...