Laboratory Determination of VO2 max
In a laboratory setting, VO2 max (ie maximal oxygen consumption) can be directly measured. Participants complete progressively harder and harder activity until volitional fatigue.
By measuring how much oxygen is in the expired air, the amount of oxygen consumed during exercise can be calculated.
In a laboratory setting, oxygen consumption can be determined using gas analyzers that measure the oxygen and carbon dioxide levels in the expired air. If a person undergoes maximal exercise during a laboratory test, the maximal oxygen consumption can be directly measured. This is the most accurate way to assess aerobic fitness.