have a large aerobic contribution, this does not mean that long- distance aerobic training is the best way to develop fitness(44, 46). For example, Helgerud and colleagues(44)reported that high-intensity interval training resulted in significantly greater increases in vo2,max thatraditional aerobic training. This interval-based training increase in vO2,max was related tosignificant increases in running economy, distances covered, number of involvements withthe ball, and average work intensity during a soccer game (43)The enzymatic alterations stimulated by sprint training may play an integral role in facilitating rapid muscular contractions by allowing for a faster rate of ATP supply from the glycolyticsystems. Adaptation to multiple bouts of high-intensity sprint intervals seems to produce asuperior training stimulus, which appears to translate to team sports play better than doestraditional endurance training High-intensity interval training should be then, the preferredendurance training modality for team sports, especially during the specific preparation phase.