A cardio fitness test evaluates how efficiently your body uses oxygen during exercise. One of the most accurate measures is VO2 max, which estimates the maximum amount of oxygen your body can utilise ...

When physically demanding activities are performed at high altitudes or in other low-oxygen environments, excellent coordination, judgment, and decision-making are important. In some cases, such as ...

Smartwatches can measure everything from heart rate to sleep quality, but one health metric has become particularly relevant over the past two years: blood oxygen saturation. Two of the world's ...