临界功率与自行车计时赛成绩相关。

Critical power is related to cycling time trial performance.

作者信息

Smith J C, Dangelmaier B S, Hill D W

机构信息

Department of Kinesiology, Southwestern University, Georgetown, TX 78627, USA.

出版信息

Int J Sports Med. 1999 Aug;20(6):374-8. doi: 10.1055/s-2007-971147.

DOI:10.1055/s-2007-971147

PMID:10496116

Abstract

The purpose of this study was to evaluate critical power (W(CP)) as an indicator of aerobic fitness in trained cyclists, and to determine its relationship to cycling time trial (TT) performance. Thirteen competitive USCF category 2 or 3 cyclists provided season's best 40 km TT times (mean [SD]) time = 59.6 min (3.1), and performed two 17 km TT under controlled conditions (26.6 min [1.1]). Ventilatory threshold (VT) and VO2max were determined from a maximal incremental test. W(CP) was calculated using the results of four all-out constant power tests. Mean W(CP) was 299 (61) W or 4.1 W x kg(-1), VT was 3616 (750) ml x min(-1) or 49.8 ml x kg(-1) x min(-1) (7.5), and VO2max was 4596 ml x min(-1) or 63.5 ml x kg(-1) x min(-1) (8.0). W(CP) was strongly related to VT and VO2max, demonstrating that it can serve as a measure of aerobic fitness in this population. Expressions of W(CP) were slightly to considerably more highly related to 17 km and 40 km TT performances (r = -0.77 to -0.91) than were expressions of VT and VO2max (r = -0.71 to -0.87). It is concluded that W(CP) provides an aerobic fitness measure for competitive cyclists which can be obtained without invasive testing. In addition, W(CP) is strongly related to the TT performance of competitive cyclists.

摘要

本研究的目的是评估临界功率（W(CP)）作为训练有素的自行车运动员有氧适能的指标，并确定其与自行车计时赛（TT）成绩的关系。13名美国自行车联合会2级或3级的竞技自行车运动员提供了赛季最佳40公里TT成绩（均值[标准差]），时间=59.6分钟（3.1），并在受控条件下进行了两次17公里TT（26.6分钟[1.1]）。通过最大递增测试确定通气阈值（VT）和最大摄氧量（VO₂max）。使用四次全力恒定功率测试的结果计算W(CP)。平均W(CP)为299（61）瓦或4.1瓦×千克⁻¹，VT为3616（750）毫升×分钟⁻¹或49.8毫升×千克⁻¹×分钟⁻¹（7.5），VO₂max为4596毫升×分钟⁻¹或63.5毫升×千克⁻¹×分钟⁻¹（8.0）。W(CP)与VT和VO₂max密切相关，表明它可作为该人群有氧适能的一种度量。与VT和VO₂max的表达式相比，W(CP)的表达式与17公里和40公里TT成绩的相关性略高至显著更高（r = -0.77至-0.91），而VT和VO₂max的相关性为r = -0.71至-0.87）。得出的结论是，W(CP)为竞技自行车运动员提供了一种有氧适能度量，无需进行侵入性测试即可获得。此外，W(CP)与竞技自行车运动员的TT成绩密切相关。