Wisløff U, Helgerud J
Department of Sport Sciences, Norweigan University of Science and Technology, Trondheim, Norway.
Med Sci Sports Exerc. 1998 Aug;30(8):1314-20. doi: 10.1097/00005768-199808000-00021.
A new specific ski ergometer has been developed to study aerobic endurance and force development in the upper body of cross-country skiers. The major purpose of the present study was to examine the validity and the reliability of this ergometer. Eleven male cross-country skiers participated in the study. Work on the ski ergometer, at an inclination of 4 degree, incorporated the double-poling technique. All subjects participated in three tests in addition to a pretest where peak oxygen uptake in the upper body (VO2peak) and maximal oxygen uptake during treadmill running (VO2max) were measured. In a field-test, subjects performed double poling uphill, and VO2peak was reached after 4-6 min. There was no statistically significant differences in power output (Watt) or oxygen uptake (VO2) at the same exercise stages between tests and the coefficient of variation was 2.0% and 2.5%, respectively. There were no significant differences between VO2peak as measured in the field and on the ski ergometer. The average upper body/leg ratio was 90% (range 78.1-97.1%). There was no significant correlation between VO2max and VO2peak. The present study showed the ski ergometer to be both reliable and valid for evaluating VO2 and force development in the upper body at submaximal and maximal workloads for cross-country skiers.
一种新型的特定滑雪测力计已被开发出来，用于研究越野滑雪运动员上半身的有氧耐力和力量发展。本研究的主要目的是检验这种测力计的有效性和可靠性。11名男性越野滑雪运动员参与了这项研究。在4度倾斜的滑雪测力计上进行的工作采用了双杖技术。除了预测试（测量上半身的峰值摄氧量（VO2peak）和跑步机跑步时的最大摄氧量（VO2max））外，所有受试者还参加了三项测试。在一项实地测试中，受试者进行双杖上坡，4-6分钟后达到VO2peak。在相同运动阶段，测试之间的功率输出（瓦特）或摄氧量（VO2）没有统计学上的显著差异，变异系数分别为2.0%和2.5%。实地测量的VO2peak与滑雪测力计上测量的VO2peak之间没有显著差异。上半身/腿部的平均比例为90%（范围为78.1-97.1%）。VO2max与VO2peak之间没有显著相关性。本研究表明，对于评估越野滑雪运动员在次最大和最大工作量下上半身的VO2和力量发展，滑雪测力计是可靠且有效的。
