Brodowicz G R, King D S, Ribisl P M
Exercise Physiology Laboratory, School of Health and Physical Education, Portland State University, OR 97207.
Ergonomics. 1991 Jan;34(1):49-56. doi: 10.1080/00140139108967287.
The purpose of this study was to investigate the effects of the use of toeclips on the ventilatory threshold (VT) of cyclists and runners during cycle ergometry. Ten competitive cyclists and ten well-trained runners performed two continuous maximal cycle ergometer tests, once with toeclips and once without toeclips. Respiratory data were collected every 20 s and used to determine VT and VO2 max. For cyclists, the mean (congruent to SEM) oxygen uptake at VT (VO2, VT) was greater during the trial with toeclips (48.8 +/- 1.9 ml kg-1 min-1 and 46.9 +/- 1.9 ml kg-1 min-1 during cycle ergometry with and without toeclips, respectively; p less than 0.05). No significant difference in VO2, VT was noted between trials for runners. The cyclists also demonstrated a higher VO2 max during the trial with toeclips (58.8 +/- 3.0 ml kg-1 min-1) compared to the trial without toeclips (54.4 +/- 2.0 ml kg-1 min-1; p less than 0.05). When expressed relative to VO2 max (%VO2 max) the VT during the toeclip trial for cyclists was significantly decreased (p less than 0.05). These data suggest that the cyclists in this study developed specific adaptations related to the use of toeclips, and the use of toeclips during cycle ergometry is therefore recommended. We recommend that future studies report results with VT expressed in both absolute (VO2) and relative (%VO2 max) terms.
本研究的目的是调查在自行车测功过程中使用脚套对自行车运动员和跑步运动员通气阈（VT）的影响。十名竞技自行车运动员和十名训练有素的跑步运动员进行了两次连续的最大自行车测功测试，一次使用脚套，一次不使用脚套。每20秒收集一次呼吸数据，并用于确定VT和最大摄氧量（VO2 max）。对于自行车运动员，在使用脚套的试验中，VT时的平均（等同于标准误）摄氧量（VO2，VT）更大（在使用和不使用脚套的自行车测功过程中，分别为48.8±1.9 ml·kg-1·min-1和46.9±1.9 ml·kg-1·min-1；p<0.05）。跑步运动员的试验之间VO2，VT没有显著差异。与不使用脚套的试验（54.4±2.0 ml·kg-1·min-1）相比，自行车运动员在使用脚套的试验中也表现出更高的VO2 max（58.8±3.0 ml·kg-1·min-1；p<0.05）。当以相对于VO2 max（%VO2 max）表示时，自行车运动员在脚套试验期间的VT显著降低（p<0.05）。这些数据表明，本研究中的自行车运动员形成了与使用脚套相关的特定适应性变化，因此建议在自行车测功过程中使用脚套。我们建议未来的研究报告VT以绝对（VO2）和相对（%VO2 max）两种形式表示的结果。
