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A pilot study comparing two field tests with the treadmill run test Aziz, A.R., Frankie, H.Y., and Kong, C.T. Evaluation of aerobic capacity in soccer players:Ĭomparison of field and laboratory tests. Alemdaroglu, U., Dündar, U., Köklü, Y., and Asci, A. (17) found no statistical differences between two YYIRTs level 2 performedĭue to the nature of the tests and despite their significant correlation with VO2max (3, 25), it seems that the level 1 was correlated to a greater extent with VO2max compared to level 2.įurthermore, the YYIRT level 2 score was not correlated with VO2max in youth (pre-pubescent) football players (8).ġ. Although displaying a relative high CV of 9.6%, Krustrup et al. Level 2 also seemed to be reliable and valid (17).
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the total high-intensity running distance, high-intensity running distance during the final 15 minutes of each half, and moderately correlated with total distance covered during match-play inįemale (16) professional football players.the high-intensity running, sum of high-speed running and sprinting, and the total distance covered during match play in male professional football players (15).The physiological responses whilst performing the YYIRT level 1 was examined in a few investigations (15, 17, 31) and the test showed a high reliability and validity throughout a variety of levelįurthermore, there seems to be a correlation between the YYIRT level 1 and: Of the aerobic system, whereas level 2 determines an individual’s ability to recover from repeated exercise with a high contribution from the anaerobic system”. The authors stated that level 1 focus “on the capacity to carry out intermittent exercise leading to a maximal activation (3) distinguished between the YYIRT level 1 and level 2. Was highly correlated with the 20m multistage shuttle run/beep test (2).įrom the testing protocol it was concluded that the YYIE tests are more aerobic related, whereas the YYIR tests are aerobic-anaerobic related (32)īangsbo et al. The measured VO2max measured in the YYIET level 2 However, both levels (1 and 2) were reported to underestimate the VO2max, compared to a continuous and an intermittent treadmill test (20). The test was correlated with high-intensity running and the totalĭistance covered during a football match in professional football players. The YYIET level 2 seems to a reliable (measured in youth and senior football players) and sensible assessment tool (4, 6). Generally, similar findings were presented for level 2 (2, 23). YYIET level 1 was correlated with the 20m multistage shuttle run/beep test in youth football players (11). As a result the test can be used in developing as well as amateur players. Maximal response of the players (6) and the maximum heart rate can be measured with this test (33).
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It was shown that the level one showed weak indicator of aerobic endurance in youth (20). Validity of level 1 was examined in elite football players (20). It is possible that a power outlet and an exension cord is also needed to ensure power for the audio player. In order to perform the test, obviously the audio tape and an audio players is needed. To test a team of 21 players, three testers should be present. If a player fail to complete a shuttle within the given third “beep” twice, he will stop the test and the final score is the last shuttle the player has completed.Īs the speed of running is fast at later stages of the test, we believe that one coach can observe up to 7 players at the same time if he/she stands on the side of the start/finish line. The next “beep” will signal the start of the next shuttle and procedures proceed as described. YYIRT) players will receive a 5 or 10 second recovery break then. A third “beep” will indicate the finish of one shuttle and all players need to reach the start line by this “beep”.ĭepending on the test (YYIET vs.
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With the first “beep” the players will start running towards the 20-meter marker and should reach it by the second “beep”, whichĪlso indicate the players to turn around and run back to the original start. An acoustic signal (“beep”) will indicate the speed of running.