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 ...

First author Yasser Khan holds the sensor, which is made of an alternating array of printed LEDs and photodetectors that can detect blood-oxygen levels anywhere in the body. (Courtesy: Yasser Khan, ...

Oxygen is absorbed by a protein in your blood called hemoglobin. When you breathe, your lungs load up blood cells with oxygen, then the pumping of your heart circulates the oxygen-rich blood through ...

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 ...

Posts from this author will be added to your daily email digest and your homepage feed. Doctors say one of the best ways to monitor patients with COVID-19 is by tracking their blood oxygen levels, ...

Starting Thursday, the ability to measure blood oxygen levels will no longer be available on newly purchased Apple Watch Series 9 and Watch Ultra 2 models. According to the tech giant, customers who ...