European Journal of Applied Physiology

, Volume 112, Issue 5, pp 1973–1975 | Cite as

The maximal and sub-maximal versions of the Yo-Yo intermittent endurance test level 2 are simply reproducible, sensitive and valid

  • Paul S. Bradley
  • Michele Di Mascio
  • Jens Bangsbo
  • Peter Krustrup
Letter to the Editor

Dear Editor,

We appreciate Drs. Mendez-Villanueva and Buchheit’s interest in our work (Bradley et al. 2011b) and agree that the relationship between physical capacity and match performance of soccer players is complex. However, there are several flaws in their critique of our study (Mendez-Villanueva and Buchheit 2011) and some of them need to be corrected as a matter of record.

The first point raised by the Letter makes the assertion that our article incorrectly concludes that the Yo-Yo intermittent endurance test level 2 (Yo-Yo IE2) is a valid assessment tool for elite soccer populations. Although no exact measure of physical performance in elite soccer matches exists, the total distance and that covered at high-intensity provide useful indicators (Mohr et al. 2003). We observed a significant correlation between the Yo-Yo IE2 test performance and both total distance (r = 0.74, P < 0.01) and high-intensity running during a game (r = 0.58, P < 0.05). At this point, it is worth...


Soccer Player Match Performance Female Soccer Player Elite Player Elite Soccer Player 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Paul S. Bradley
    • 1
  • Michele Di Mascio
    • 1
  • Jens Bangsbo
    • 2
  • Peter Krustrup
    • 2
    • 3
  1. 1.Department of Sport and Exercise Sciences, Soccer Research GroupUniversity of SunderlandSunderlandUK
  2. 2.Department of Exercise and Sport SciencesUniversity of CopenhagenCopenhagenDenmark
  3. 3.Sport and Health Sciences, College of Life and Environmental SciencesUniversity of ExeterExeterUK

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