Centre of Practical Knowledge, Department of Sports, University of Nordland, Bodø, Norway.
J Sports Sci. 2012;30(13):1337-45. doi: 10.1080/02640414.2012.711484. Epub 2012 Aug 6.
We examined performance, heart rate response and construct validity of the Yo-Yo IR2 test by testing 111 elite and 92 sub-elite soccer players from Norway and Denmark. VO₂max, Yo-Yo IR1 and repeated sprint tests (RSA) (n = 51) and match-analyses (n = 39) were also performed. Yo-Yo IR2 and Yo-Yo IR1 performance was 41 and 25% better (P < 0.01) for elite than sub-elite players, respectively, and heart rate after 2 and 4 min of the Yo-Yo IR2 test was 20 and 15 bpm (9 and 6% HRmax), respectively, lower (P < 0.01) for elite players. RSA performance and VO₂max was not different between competitive levels (P > 0.05). For top-teams, Yo-Yo IR2 performance (28%) and sprinting distance (25%) during match were greater (P < 0.05) than for bottom-teams. For elite and sub-elite players, Yo-Yo IR2 performance was correlated (P < 0.05) with Yo-Yo IR1 performance (r = 0.74 and 0.76) and mean RSA time (r = -0.74 and -0.34). We conclude that the Yo-Yo IR2 test has a high discriminant and concurrent validity, as it discriminates between players of different within- and between-league competitive levels and is correlated to other frequently used intermittent elite soccer tests.
我们通过测试来自挪威和丹麦的 111 名精英球员和 92 名次精英球员，来检验 Yo-YoIR2 测试的表现、心率反应和结构有效性。还进行了最大摄氧量、Yo-YoIR1 和重复冲刺测试（RSA）（n=51）和比赛分析（n=39）。Yo-YoIR2 和 Yo-YoIR1 的表现，精英球员分别比次精英球员好 41%和 25%（P<0.01），Yo-YoIR2 测试后 2 分钟和 4 分钟的心率分别低 20 次/分和 15 次/分（9%和 6%HRmax）（P<0.01）。竞技水平之间 RSA 表现和最大摄氧量没有差异（P>0.05）。对于顶级球队，Yo-YoIR2 表现（28%）和比赛中的冲刺距离（25%）比底部球队更大（P<0.05）。对于精英和次精英球员，Yo-YoIR2 表现与 Yo-YoIR1 表现（r=0.74 和 0.76）和平均 RSA 时间（r=-0.74 和 -0.34）相关（P<0.05）。我们得出结论，Yo-YoIR2 测试具有很高的区分度和同时有效性，因为它可以区分不同联赛内和联赛间的球员，并且与其他常用的间歇性精英足球测试相关。
