The test of maximal oxygen uptake (VO2 Max), through the use metabolimeter analyzing a breath by breath gas exchange (VO2 and VCO2), allows staff to directly measure the maximal oxygen uptake which is considered a more reliable index of the capacity exercise. Physiologically speaking, maximal oxygen uptake (VO2 Max) is the maximum volume of oxygen that a human can consume per unit of time for muscle contraction. This value is expressed in ml / min (milliliters per minute) or ml / kg / min (milliliters per kilogram of body weight per minute).
This parameter as well as the level of training can be influenced by several factors such as different muscles are used, age, sex, genetics and efficiency of athletic movement.
The test of the maximum oxygen uptake (VO2 Max) is incremental ceiling, that provides for increases in intensity at regular intervals until reaching exhaustion.
analysis of gas exchange (VO2 and VCO2) is detected by performing the test with a special mask attached to a metabolimeter that elaborates all the data for a period of approximately 15 minutes, the main parameter measured is the oxygen consumption (VO2) and consumption of carbon dioxide (VCO2), but also the variables are combined with heart rate and the load in watts or km / h.
for cyclists VO2 Max test is done with your bike on a cycle ergometer resistance aeroedinamica, the test provides for increases of 10-20 W every minute depending on the level of the athlete.
For runners instead of the VO2 Max test is done on a treadmill and expected increases in 0.5 to 1 km / h again depending on the level of the athlete.
addition to the maximum oxygen uptake in this assay can detect the ventilatory anaerobic threshold: a method proposed by Wasserman that relates the evolution of ventilation, ie the volume of air inhaled and exhaled from the lungs in one minute, and oxygen consumption, a higher intensity anaerobic threshold ventilation abruptly increases while oxygen consumption remains linear, and thus the respiratory quotient (ie the ratio between carbon dioxide and oxygen consumed) is higher one.
This test is also interesting because it allows us to identify the MAS (maximal aerobic speed) which corresponds to the maximum intensity in which the body is capable of delivering energy through aerobic metabolism.
The test of maximal oxygen uptake (VO2 Max) is therefore another good way to identify training and personal rhythms to assess their state of fitness during the season.
Dr. Matthew Michelusi
Responsible Test Preparation Center and Prism - Medical Study and Research Center AURA Activator
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