The concept of VO2 max was first introduced by Nobel Prize-winning physiologist A.V. Hill in 1923, who found that the amount of oxygen consumed by his muscles increased as he ran at a steadily increasing pace – up to a point. Eventually, his oxygen consumption would plateau, even if he continued to run faster and faster until he reached exhaustion. That plateau, he argued, represented his body’s “maximal oxygen uptake,” or VO2max. Vo2Max (also maximal oxygen consumption, maxi