Yo-Yo Intermittent Endurance Test

Testing and measurement are the means of collecting information upon which subsequent performance evaluations and decisions are made but in the analysis we need to bear in mind the factors that may influence the results.

The Yo-Yo Intermittent Endurance Test is similar to the Yo-Yo Endurance Test, except the athlete has a short active 5 second break. There are two versions of the test. The level 1 test is designed for recreational level players, while the level 2 test is for elite players. This test was developed by the Jens Bangsbo (Danish soccer physiologist) and his colleagues. Details of the test are contained in his book " Fitness Training in Football, a scientific approach" published by August Krogh Institute - Copenhagen University.

Objective

The objective of the "Yo-Yo Intermittent Endurance Test" is to monitor the development of the athlete's maximum oxygen uptake (VO2max) and ability to perform repeated interval work.

Required Resources

To undertake this test you will require :

  • A flat, non slippery surface at least 20 metres in length
  • 30 metre tape measure
  • Marking cones
  • The Yo-Yo Intermittent Endurance Test CD
  • CD Player
  • Recording sheets
  • Assistant

How to conduct the test

The test is conducted as follows:

Yo-Yo Test

  • Measure out a 20 metre and 2.5m section and mark with cones (A, B and C)
  • The athlete starts at cone B, when signalled by the CD the athlete runs to cone C
  • When signalled by the CD the athlete runs from cone C to cone B
  • The athlete then has a 5 second active recovery by jogging to cone A and back to cone B
  • The athlete continues running between the cones as signalled by the CD
  • A warning is given when the athlete does not complete a successful out and back shuttle (cone B to C and and back to B) in the allocated time, the the next time the athlete does not complete a successful shuttle the test is stopped
  • Record the total distance completed
  • The test takes between 6-20 minutes for level 1 and between 2-10 minutes for level 2

Analysis

Analysis of the result is by comparing it with the results of previous tests. It is expected that, with appropriate training between each test, the analysis would indicate an improvement.

Target Group

This test was developed specifically for soccer players, though it is suitable for similar sports where the athlete's participation is intermittent. The test is not suitable for individuals where a maximal exercise test would be contraindicated.

101 Performance Evaluation Tests

Reliability

Test reliability refers to the degree to which a test is consistent and stable in measuring what it is intended to measure.

Reliability will depend upon how strict the test is conducted and the individual's level of motivation to perform the test.

Validity

Test validity refers to the degree to which the test actually measures what it claims to measure and the extent to which inferences, conclusions, and decisions made on the basis of test scores are appropriate and meaningful. This test provides a means to monitor the effect of training on the athlete's physical development.

Related Books and Papers

  • Jens Bangsbo, 1994, " Fitness Training in Football, a scientific approach"
  • Krustrup P, et al., 2006, "The Yo-Yo IR2 Test: physiological response, reliability, and application to elite soccer", Medicine & Science in Sports & Exercise. Sep;38(9):1666-73
  • Krustrup, P., et al., 2003, "The Yo-Yo Intermittent Recovery Test: Physiological Response, Reliability, and Validity", Medicine & Science in Sports & Exercise. 35(4), 697-705

Associated Pages

The following Sports Coach pages should be read in conjunction with this page: