Durocher John J, Leetun Darin T, Carter Jason R
Department of Exercise Science, Health and Physical Education, Michigan, Technological University, Houghton, MI 49931, USA.
Appl Physiol Nutr Metab. 2008 Dec;33(6):1165-71. doi: 10.1139/H08-107.
The purpose of this study was to examine lactate threshold (LT) and maximal aerobic capacity with a sport-specific skating protocol throughout a competitive season in collegiate hockey players. We hypothesized that maximal aerobic capacity and skating velocity at LT would increase as the season progressed. Sixteen Division I college hockey players performed a graded exercise skating protocol to fatigue at 3 different times (pre-, mid-, and postseason). Subjects skated for 80 s during each stage, followed by 40 s of rest to allow for blood lactate sampling. Velocity at LT was similar during preseason (4.44 +/- 0.08 m.s-1) and postseason (4.52 +/- 0.05 m.s-1) testing, but was significantly elevated at midseason (4.70 +/- 0.08 m.s-1; p < 0.01), compared with preseason. In contrast, LT as a percentage of maximal heart rate (HRmax) was unchanged throughout the season. HRmax remained constant throughout the season, at approximately 190 beats.min-1. Preseason maximal aerobic capacity (48.7 +/- 0.8 mL.kg-1.min-1) was significantly higher than that at postseason (45.0 +/- 1.1 mL.kg-1.min-1; p < 0.01). In conclusion, skating velocity at LT improved from pre- to midseason, but this adaptation was not maintained at postseason. Additionally, maximal aerobic capacity was reduced from pre- to postseason. These findings suggest a need for aerobic training throughout the college hockey season.
本研究的目的是通过一项特定于运动项目的滑冰方案，在大学曲棍球运动员的一个竞技赛季中，检测乳酸阈值（LT）和最大有氧能力。我们假设随着赛季的推进，最大有氧能力和乳酸阈值时的滑冰速度会增加。16名一级大学曲棍球运动员在3个不同时间（赛季前、赛季中、赛季后）进行了分级运动滑冰方案直至疲劳。在每个阶段，受试者滑冰80秒，随后休息40秒以便进行血乳酸采样。与赛季前相比，赛季前（4.44±0.08米·秒⁻¹）和赛季后（4.52±0.05米·秒⁻¹）测试时乳酸阈值时的速度相似，但在赛季中显著升高（4.70±0.08米·秒⁻¹；p<0.01）。相比之下，乳酸阈值占最大心率（HRmax）的百分比在整个赛季中没有变化。HRmax在整个赛季中保持恒定，约为190次·分钟⁻¹。赛季前的最大有氧能力（48.7±0.8毫升·千克⁻¹·分钟⁻¹）显著高于赛季后（45.0±1.1毫升·千克⁻¹·分钟⁻¹；p<0.01）。总之，乳酸阈值时的滑冰速度从赛季前到赛季中有所提高，但这种适应性在赛季后没有保持。此外，最大有氧能力从赛季前到赛季后有所降低。这些发现表明在整个大学曲棍球赛季都需要进行有氧训练。
