Williams C, Nute M L
Br J Sports Med. 1983 Sep;17(3):152-61. doi: 10.1136/bjsm.17.3.152.
The purpose of this study was to assess the physiological demands of a half-marathon race on a group of ten recreational runners (8 men and 2 women). The average running speed was 223.1 +/- 22.7 m.min-1 (mean +/- SD) for the group and this represented 79 +/- 5% VO2 max for these runners. There was a good correlation between VO2 max and performance time for the race (4 = -0.81; p less than 0.01) and an even better correlation between running speed equivalent to a blood lactate concentration of 4 mmol.l-1 and performance times (r = -0.877; p less than 0.01). The blood lactate concentration os 4 of the runners at the end of the race was 5.65 +/- 1.42 mmol.l-1 (mean +/- SD) and the estimated energy expenditure for the group was 6.22 M.J. While there was only a poor correlation between total energy expenditure and performance time for the race, the correlation coefficient was improved when the energy expenditure of each individual was expressed in KJ.kg-1 min-1 (r = 0.938; p less than 0.01).
本研究的目的是评估一场半程马拉松比赛对一组10名业余跑步者（8名男性和2名女性）的生理需求。该组的平均跑步速度为223.1 +/- 22.7米·分钟⁻¹（平均值 +/- 标准差），这相当于这些跑步者最大摄氧量的79 +/- 5%。比赛的最大摄氧量与成绩时间之间存在良好的相关性（r = -0.81；p < 0.01），与相当于血乳酸浓度为4毫摩尔·升⁻¹时的跑步速度和成绩时间之间的相关性更好（r = -0.877；p < 0.01）。比赛结束时，4名跑步者的血乳酸浓度为5.65 +/- 1.42毫摩尔·升⁻¹（平均值 +/- 标准差），该组的估计能量消耗为6.22兆焦耳。虽然总能量消耗与比赛成绩时间之间的相关性较差，但当以千焦·千克⁻¹·分钟⁻¹表示每个个体的能量消耗时，相关系数有所改善（r = 0.938；p < 0.01）。
