Apple Watch can now monitor your cardio fitness

Cardiorespiratory fitness, as measured by VO2 max, is a very important metric not only for people who are actively engaging in physical activity but for pretty much anyone. It shows the ability of the human body to utilize oxygen during exercise or high physical activity, and pretty much tells you if you’re in shape or not.

Now, with iOS 14.3 and watchOS 7.2 Apple watch users can view their cardio fitness level in the Health app on iPhone, and receive a notification on Apple Watch if it falls within the low range. Apple watch already had the ability to measure VO2 max but with the latest update, Apple has included special algorithms that use multiple data sources - including the optical heart sensor, GPS, and the accelerometer - to estimate low VO2 max levels.

Normally, measuring VO2 max levels requires intensive and prolonged exercises, but with the new algorithms, Apple Watch can measure this metric during the day even if people don’t engage in a rigorous workout. That’s really important for people who don’t exercise much, as there’s a correlation between low VO2 max levels and various serious health problems such as heart disease, high blood pressure, and obesity, later in life.