I come from a history of auto racing - I have worked on Indy cars, pro cups and a myriad of other types of professionally sanctioned cars where millimeters are considered in altering the drag coefficient and making the air flow over or under at a rate of least resistance.

In the world of endurance, it seems that you cannot discuss fitness without discussing VO2 max. Ask any endurance athlete about it and you will hear epic stories with names like Indurain, LeMond, and Armstrong. Many of you however, may find yourselves wondering what exactly VO2 max is and why is it so important.