For many sports, the aerobic capacity of an athlete dictates success. Obvious examples include long distance events such as the marathon, Tour de France and Nordic skiing. Furthermore, for sports such as soccer and rugby, which also contain a plethora of high-intensity anaerobic bouts, aerobic capacity is still deemed a significant physiological determinant to success. For example, it has been shown repeatedly that aerobic capacity is positively related to the distance covered, time on the ball and number of sprints (including repeated sprint ability) during a soccer match.