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 ...

is a senior reporter and author of the Optimizer newsletter. She has more than 13 years of experience reporting on wearables, health tech, and more. Before coming to The Verge, she worked for Gizmodo ...

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 ...

Fitbit has dropped a patent for a medical grade smart ring, in what could be a dramatic new form factor for the Google-owned company. A filing at the US Patent and Trademark Office (spotted by ...

Let's get the disclaimer out of the way first: I'm not a doctor. Nothing I'm going to tell you is backed by any medical training. You should definitely see your doctor before making any decisions, ...