Sports Medicine

, Volume 38, Issue 1, pp 37–51 | Cite as

The Yo-Yo Intermittent Recovery Test

A Useful Tool for Evaluation of Physical Performance in Intermittent Sports
  • Jens BangsboEmail author
  • F. Marcello Iaia
  • Peter Krustrup
Review Article


The two Yo-Yo intermittent recovery (IR) tests evaluate an individual’s ability to repeatedly perform intense exercise. The Yo-Yo IR level 1 (Yo-Yo IR1) test focuses on the capacity to carry out intermittent exercise leading to a maximal activation of the aerobic system, whereas Yo-Yo IR level 2 (Yo-Yo IR2) determines an individual’s ability to recover from repeated exercise with a high contribution from the anaerobic system. Evaluations of elite athletes in various sports involving intermittent exercise showed that the higher the level of competition the better an athlete performs in the Yo-Yo IR tests. Performance in the Yo- Yo IR tests for young athletes increases with rising age. The Yo-Yo IR tests have shown to be a more sensitive measure of changes in performance than maximum oxygen uptake. The Yo-Yo IR tests provide a simple and valid way to obtain important information of an individual’s capacity to perform repeated intense exercise and to examine changes in performance.


Soccer Player Intermittent Exercise Male Soccer Player Soccer Referee Intermittent Recovery 
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

© Adis Data Information BV 2008

Authors and Affiliations

  • Jens Bangsbo
    • 1
    Email author
  • F. Marcello Iaia
    • 2
  • Peter Krustrup
    • 1
  1. 1.Institute of Exercise and Sport SciencesUniversity of Copenhagen, Copenhagen Muscle Research CentreDenmark
  2. 2.Faculty of Exercise SciencesState University of MilanItaly

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