Department of Exercise Science, Health, and Physical Education, Michigan Technological University, Houghton, MI 49931, USA.
Appl Physiol Nutr Metab. 2010 Feb;35(1):35-9. doi: 10.1139/H09-129.
The purpose of this study was to compare lactate thresholds (LT) and maximal aerobic capacities (VO(2 max) during sport-specific skating (on ice) and cycle ergometry (off ice) in collegiate hockey players. We hypothesized that VO(2 max) and LT would be higher on ice. We also sought to determine if on-ice and off-ice VO(2 max) values were correlated. Twelve collegiate hockey players performed both graded exercise protocols in randomized order to fatigue. Both protocols included 80 s of work during each stage, followed by 40 s of rest to allow for blood lactate sampling. VO(2 max) was significantly higher on ice (46.9 +/- 1.0 mLkg(-1)min(-1)) than off ice (43.6 +/- 0.9 mLkg(-1)min(-1); p < 0.05). Maximal heart rate (HR(max)) was also higher on ice (192.2 +/- 1.8 beatsmin(-1)) than off ice (186.0 +/- 1.5 beatsmin(-1); p < 0.01). LT was drastically higher on ice than off ice as a percentage of VO(2 max) (85.9% +/- 1.9% vs. 69.7% +/- 1.3%; p < 0.01) and HR(max) (90.1% +/- 1.3% vs. 79.4% +/- 1.6%; p < 0.01). Finally, no correlation existed between VO(2 max) values off ice and on ice (r = -0.002; p = 0.99). Our results indicate that off-ice VO(2 max) and LT are not adequate predictors of on-ice VO(2 max) and LT in collegiate hockey players. These findings challenge the use of cycle ergometry to assess aerobic capacity at events such as the National Hockey League Entry Draft combine. We suggest that hockey players be tested in a sport-specific manner, regardless of whether those tests are performed on ice or off ice.
本研究的目的是比较冰上和陆地两种运动专项条件下，大学生曲棍球运动员的乳酸阈（LT）和最大有氧能力（VO2max）。我们假设冰上的 VO2max 和 LT 会更高。我们还试图确定冰上和陆地的 VO2max 值是否相关。12 名大学生曲棍球运动员以随机顺序完成两种递增负荷运动方案，直至疲劳。两种方案均包括每个阶段 80s 的工作，然后休息 40s 以允许血乳酸采样。VO2max 冰上（46.9 ± 1.0 mLkg-1min-1）显著高于陆地（43.6 ± 0.9 mLkg-1min-1；p < 0.05）。最大心率（HRmax）冰上（192.2 ± 1.8 beatsmin-1）也高于陆地（186.0 ± 1.5 beatsmin-1；p < 0.01）。与陆地相比，冰上 LT 作为 VO2max 的百分比高得多（85.9% ± 1.9% vs. 69.7% ± 1.3%；p < 0.01）和 HRmax（90.1% ± 1.3% vs. 79.4% ± 1.6%；p < 0.01）。最后，陆地和冰上的 VO2max 值之间没有相关性（r = -0.002；p = 0.99）。我们的结果表明，陆地 VO2max 和 LT 不能充分预测大学生曲棍球运动员的冰上 VO2max 和 LT。这些发现对使用功率自行车来评估国家冰球联盟选秀营等活动中的有氧能力提出了挑战。我们建议无论测试是在冰上还是陆地进行，都应以运动专项的方式测试曲棍球运动员。
