Ramsbottom R, Williams C, Fleming N, Nute M L
Department of Physical Education and Sports Science, University of Technology, Loughborough, England.
Br J Sports Med. 1989 Sep;23(3):171-6. doi: 10.1136/bjsm.23.3.171.
The purpose of the present study was to examine the relationship between improvements in running performance and some of the prominent physiological and metabolic adaptations to endurance exercise training. Twelve male undergraduates agreed to participate in this study (trial group), aged matched physical education students provided a control group. Running performance, assessed as a five km time trial, improved from 19.69 +/- 2.24 to 19.22 +/- 2.03 min in the trial group (P less than 0.01) after training. Maximal oxygen uptake values increased from 56.0 +/- 6.1 to 60.7 +/- 5.4 ml.kg-1.min-1, the running speed equivalent to a blood lactate reference concentration of 4 mmol.l-1 (V-4 mM) increased from 3.79 +/- 0.77 to 4.04 +/- 0.71 m.s-1, and the rate of oxygen consumption at 3.58 m.s-1 (running economy) increased from 43.3 +/- 3.2 to 45.0 +/- 3.4 ml.kg-1.min-1 (P less than 0.01). The control group did not show any significant changes. The improved five km times in the trial group were significantly correlated (r = -0.71; P less than 0.01) with changes in the running economy rather than changes in the VO2 max (r = -0.07; ns), or V-4 mM (r = -0.13; ns) suggesting the increased rate of oxygen utilization reflected a greater oxidative degradation of metabolic substrates together with a slower rate of lactate production.
本研究的目的是探讨跑步成绩的提高与耐力运动训练所引起的一些显著生理和代谢适应性变化之间的关系。12名男性大学生同意参与本研究（试验组），年龄匹配的体育专业学生组成对照组。以5公里计时赛评估跑步成绩，试验组在训练后从19.69±2.24分钟提高到19.22±2.03分钟（P<0.01）。最大摄氧量从56.0±6.1增加到60.7±5.4毫升·千克⁻¹·分钟⁻¹，相当于血乳酸参考浓度4毫摩尔·升⁻¹（V-4 mM）的跑步速度从3.79±0.77增加到4.04±0.71米·秒⁻¹，3.58米·秒⁻¹时的耗氧率（跑步经济性）从43.3±3.2增加到45.0±3.4毫升·千克⁻¹·分钟⁻¹（P<0.01）。对照组未显示任何显著变化。试验组5公里时间的改善与跑步经济性的变化显著相关（r = -0.71；P<0.01），而与最大摄氧量的变化（r = -0.07；无显著性差异）或V-4 mM的变化（r = -0.13；无显著性差异）无关，这表明增加的氧利用率反映了代谢底物更大程度的氧化降解以及乳酸生成速率的降低。
