The test involves a total of 20 minutes running or cycling as 5 x 4 minutes with the starting power / velocity determined by your current fitness and goals. If the test is combined with a VO2 max test we use the data from the VO2 max test to determine the starting power / velocity.
You will be wearing a mask that connects to a machine that continually measures your oxygen consumption and CO2 production
The aim of the test is to measure the amount of energy you are using to run at each intensity and from the data we can calculate the % of carbohydrates and fats being used. This gives a better understanding of fuelling requirements for training and racing