踏板节奏对高性能少年耐力自行车运动员累积氧亏、最大有氧能力和血乳酸过渡阈值的影响。

S M Woolford, R T Withers, N P Craig, P C Bourdon, T Stanef, I McKenzie
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引用次数: 41

摘要

在这项研究中,我们研究了踏板节奏对10名高性能少年耐力自行车运动员的循环经济性、累积氧赤字(AOD)、最大耗氧量(VO2max)和血乳酸过渡阈值的影响[平均(SD): 17.4(0.4)岁;183.8(3.5)厘米,71.56(3.75)公斤]。在三个测力仪上测量循环经济性,具体的节奏要求为:道路双链环(RDCR90-100 rpm)测力仪90-100 rpm,轨道双链环(TDCR120-130 rpm)测力仪120-130 rpm,轨道单链环(TSCR90-130 rpm)测力仪90-130 rpm。然后,结合TSCR90-130 rpm测功仪上2分钟最大速度训练的数据,利用对每个测功仪功率输出的耗氧量(VO2)的回归来估计aod。VO2对各测功仪输出功率的回归结果有显著差异(P
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of pedal cadence on the accumulated oxygen deficit, maximal aerobic power and blood lactate transition thresholds of high-performance junior endurance cyclists.

In this study we investigated the effect of pedal cadence on the cycling economy, accumulated oxygen deficit (AOD), maximal oxygen consumption (VO2max) and blood lactate transition thresholds of ten high-performance junior endurance cyclists [mean (SD): 17.4 (0.4) years; 183.8 (3.5) cm, 71.56 (3.75) kg]. Cycling economy was measured on three ergometers with the specific cadence requirements of: 90-100 rpm for the road dual chain ring (RDCR90-100 rpm) ergometer, 120-130 rpm for the track dual chain ring (TDCR120-130 rpm) ergometer, and 90-130 rpm for the track single chain ring (TSCR90-130 rpm) ergometer. AODs were then estimated using the regression of oxygen consumption (VO2) on power output for each of these ergometers, in conjunction with the data from a 2-min supramaximal paced effort on the TSCR90-130 rpm ergometer. A regression of VO2 on power output for each ergometer resulted in significant differences (P<0.001) between the slopes and intercepts that produced a lower AOD for the RDCR90-100 rpm [2.79 (0.43) l] compared with those for the TDCR120-130 rpm [4.11 (0.78) l] and TSCR90-130 rpm [4.06 (0.84) l]. While there were no statistically significant VO2max differences (P = 0.153) between the three treatments [RDCR90-100 rpm: 5.31 (0.24) l x min(-1); TDCR120-130 rpm; 5.33 (0.25) 1 x min(-1); TSCR90-130 rpm: 5.44 (0.27) l x min(-1)], all pairwise comparisons of the power output at which VO2max occurred were significantly different (P<0.001). Statistically significant differences were identified between the RDCR90-100 rpm and TDCR120-130 rpm tests for power output (P = 0.003) and blood lactate (P = 0.003) at the lactate threshold (Thla-), and for power output (P = 0.005) at the individual anaerobic threshold (Thiat). Our findings emphasise that pedal cadence specificity is essential when assessing the cycling economy, AOD and blood lactate transition thresholds of high-performance junior endurance cyclists.

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