VO₂ max refers to the maximum amount of oxygen your body can absorb and use ... Submaximal exercise tests are still a useful way to measure your VO₂ max levels and your overall levels of ...

You can easily check your blood oxygen levels with an oximeter, which provides readings in units of SpO2, a measure of oxygen saturation. A normal blood oxygen level for a healthy adult or child ...

As air becomes less dense, it contains less gases per unit of volume ... limits of someone trying to climb without oxygen. Only one direct measurement of atmospheric pressure has ever been ...