Blondel N, Berthoin S, Billat V, Lensel G
Laboratoire d'Etudes de la Motricité Humaine, Faculté des Sciences du Sport et de l'Education Physique, Université de Lille 2, France.
Int J Sports Med. 2001 Jan;22(1):27-33. doi: 10.1055/s-2001-11357.
The aim of the present study was to explain the inter-individual variability in running time to exhaustion (tlim) when running speed was expressed as a percentage of the velocity, associated with maximal oxygen uptake (vVO2max). Indeed for the same percentage of vVO2max the anaerobic contribution to energy supply is different and could be dependent on the critical velocity (Cv) and also on the maximal running velocity (vmax). Ten subjects ran four tlim at 90, 100, 120, and 140% of vVO2max; mean and standard deviation for tlim were 839 +/- 236 s, 357 +/- 110 s, 122 +/- 27 s, and 65 +/- 17s, respectively. Each velocity was then expressed 1) as a percentage of the difference between vVO2max and Cv (%AeSR); 2) as a percentage of the difference between vmax and Cv (%MSR); 3) as a percentage of the difference between vmax and vVO2max (%AnSR). Highest correlations were found between tlim90 and tlim100 and velocity expressed as %MSR (r = -0.82, p < 0.01 and r = -0.75, p < 0.01), and between tlim120 and tlim140 and velocity expressed as %AnSR (r = -0.83, p < 0.01 and r = -0.94, p < 0.001). These results show that the same intensity relative to aerobic contribution did not represent the same absolute intensity for all and could partly explain variability in tlim. Therefore expressing intensity as a percentage of MSR for sub-maximal and maximal velocities and as a percentage of AnSR for supra-maximal velocities allows individual differences in anaerobic work capacity to be taken into account and running times to exhaustion to be predicted accurately.
本研究的目的是解释当跑步速度表示为与最大摄氧量（vVO2max）相关的速度百分比时，个体在力竭跑步时间（tlim）上的差异。实际上，对于相同百分比的vVO2max，能量供应的无氧贡献是不同的，并且可能取决于临界速度（Cv）以及最大跑步速度（vmax）。10名受试者在vVO2max的90%、100%、120%和140%下进行了4次力竭跑步；tlim的平均值和标准差分别为839±236秒、357±110秒、122±27秒和65±17秒。然后，每个速度分别表示为：1）vVO2max与Cv之差的百分比（%AeSR）；2）vmax与Cv之差的百分比（%MSR）；3）vmax与vVO2max之差的百分比（%AnSR）。在tlim90和tlim100与表示为%MSR的速度之间（r = -0.82，p < 0.01和r = -0.75，p < 0.01），以及在tlim120和tlim140与表示为%AnSR的速度之间（r = -0.83，p < 0.01和r = -0.94，p < 0.001）发现了最高的相关性。这些结果表明，相对于有氧贡献的相同强度对于所有人来说并不代表相同的绝对强度，并且可以部分解释tlim的变异性。因此，将次最大和最大速度的强度表示为MSR的百分比，将超最大速度的强度表示为AnSR的百分比，可以考虑到无氧工作能力的个体差异，并准确预测力竭跑步时间。
