Dengel D R, Graham R E, Jones M T, Norton K I, Cureton K J
Exercise Physiology Laboratory, University of Georgia, Athens 30602.
Int J Sports Med. 1990 Aug;11(4):279-83. doi: 10.1055/s-2007-1024807.
The primary purpose of this study was to determine the accuracy of estimating oxygen uptake (VO2) from the flywheel revolution rate of a bicycle wind-loaded simulator. VO2 at four different flywheel revolution rates was measured on a Findlay Road Machine (FRM). Ten male trained cyclists, 10 male untrained cyclists, 10 female trained cyclists and 10 female untrained cyclists served as subjects. Significant curvilinear relationships (P less than 0.01) were found between road speed estimated from flywheel revolution rate and VO2 expressed as 1.min-1, ml.kg-1.min-1, 1.min-1.m-2 (r = 0.97, 0.96, 0.98, respectively). The absolute standard error of the mean VO2 was 0.21 l.min-1 (9.6%), 3.71 ml.kg-1.min-1 (11.5%) and 0.10 l.min-1.m-2 (7.9%), respectively. The relationship between VO2 and speed was similar to that reported during road cycling. To determine the magnitude of between-machine differences in VO2, six subjects randomly performed cycling using two different FMR. Significant (P less than 0.05) differences between machines were found at only the highest speed. The present study indicates that it is possible to accurately predict VO2 from flywheel revolution rate using a FRM. Since the FRM appears to approximate the resistance a cyclist experiences on the road and allows cyclists to use their own bicycle, it provides a good alternative to traditional laboratory ergometers.
本研究的主要目的是确定通过自行车风阻模拟器的飞轮转速来估算摄氧量（VO₂）的准确性。在芬德利道路机（FRM）上测量了四种不同飞轮转速下的VO₂。选取了10名受过训练的男性自行车运动员、10名未受过训练的男性自行车运动员、10名受过训练的女性自行车运动员和10名未受过训练的女性自行车运动员作为研究对象。研究发现，根据飞轮转速估算的道路速度与以升·分钟⁻¹、毫升·千克⁻¹·分钟⁻¹、升·分钟⁻¹·米⁻²表示的VO₂之间存在显著的曲线关系（P＜0.01）（相关系数r分别为0.97、0.96、0.98）。平均VO₂的绝对标准误差分别为0.21升·分钟⁻¹（9.6%）、3.71毫升·千克⁻¹·分钟⁻¹（11.5%）和0.10升·分钟⁻¹·米⁻²（7.9%）。VO₂与速度之间的关系与在道路骑行中报告的关系相似。为了确定不同机器之间VO₂差异的大小，6名受试者随机使用两台不同的FRM进行骑行。仅在最高速度时发现不同机器之间存在显著（P＜0.05）差异。本研究表明，使用FRM可以根据飞轮转速准确预测VO₂。由于FRM似乎近似于骑行者在道路上所经历的阻力，并且允许骑行者使用自己的自行车，因此它为传统实验室测力计提供了一个很好的替代方案。
