University of Central Florida, Orlando, FL, USA.
Physiol Meas. 2014 Jan;35(1):31-43. doi: 10.1088/0967-3334/35/1/31. Epub 2013 Dec 17.
The purpose of this study was to examine the validity and reliability of estimated parameters of the work-time relationship during cross-country ski ergometry using the traditional multi-trial critical power (CP) test and a 3 min 'all-out' test (3MT). Fourteen recreationally active male participants (mean ± SD; age: 22.14 ± 2.85 yrs; height: 177.09 ± 6.57 cm; weight: 85.68 ± 13.56 kg) completed three testing visits. All testing was conducted using an upper-body ergometer (SkiErg, Concept2, Inc., Morrisville, VT). A graded exercise test was used to determined maximal oxygen uptake (VO2peak). Two separate 3MT sessions were used to determine oxygen uptake (VO23MT), end-test power (EP), work above end-test power (WEP) and end stroke rate (ESR). Additionally, three time trials completed in a single day at simulated distances of 300 m, 650 m and 1000 m were used to estimate CP, W' and critical stroke rate (CSR). VO2peak (3.65 ± 0.50 l · min(-1)) and VO23MT (3.59 ± 0.4 l · min(-1)) were not significantly different (p = 0.162). Intraclass correlation coefficients for EP, WEP and ESR were 0.809, 0.611 and 0.783, respectively. EP (148 ± 33 W) and CP (157 ± 49 W), were not significantly different between the testing methodologies (p = 0.290) and were highly correlated (r = 0.780). WEP (8.4 ± 3.0 kJ) and W' (8.3 ± 3.0 kJ) were similar (p = 0.947) but not related (r = 0.119), while ESR (45 ± 7 spm) and CSR (47 ± 7 spm) values were not significantly different (p = 0.238) and moderately correlated (r = 0.498). The 3MT using ski ergometry was shown to produce concurrently valid results with the traditional multi-trial CP test for CP and CSR, but not W', and elicited similar maximal oxygen uptake values when compared to a graded exercise test.
这项研究的目的是检验使用传统多试次临界功率（CP）测试和 3 分钟全力测试（3MT）来评估越野滑雪测功仪运动时间关系的有效性和可靠性。14 名有经验的男性参与者（平均 ± 标准差；年龄：22.14 ± 2.85 岁；身高：177.09 ± 6.57cm；体重：85.68 ± 13.56kg）完成了三次测试访问。所有测试均在一个上半身测功仪（SkiErg，Concept2，Inc.，Morrisville，VT）上进行。使用递增运动测试来确定最大摄氧量（VO2peak）。两次单独的 3MT 会议用于确定摄氧量（VO23MT）、终点测试功率（EP）、终点测试功率以上的工作（WEP）和终点冲程率（ESR）。此外，在一天内完成的三个时间试验，模拟距离为 300m、650m 和 1000m，用于估计 CP、W'和临界冲程率（CSR）。VO2peak（3.65 ± 0.50 l · min(-1)) 和 VO23MT（3.59 ± 0.4 l · min(-1)) 之间没有显著差异（p = 0.162）。EP、WEP 和 ESR 的组内相关系数分别为 0.809、0.611 和 0.783。EP（148 ± 33 W）和 CP（157 ± 49 W）在测试方法之间没有显著差异（p = 0.290），且高度相关（r = 0.780）。WEP（8.4 ± 3.0 kJ）和 W'（8.3 ± 3.0 kJ）相似（p = 0.947）但不相关（r = 0.119），而 ESR（45 ± 7 spm）和 CSR（47 ± 7 spm）值无显著差异（p = 0.238），中度相关（r = 0.498）。使用滑雪测功仪的 3MT 与传统的多试次 CP 测试在 CP 和 CSR 方面产生了同时有效的结果，但在 W'方面则没有，与递增运动测试相比，它产生了相似的最大摄氧量值。
