Jones A M
Department of Exercise and Sport Science, Manchester Metropolitan University, Alsager, United Kingdom.
Int J Sports Med. 2002 Jan;23(1):40-3. doi: 10.1055/s-2002-19271.
The purpose of this study was to investigate the relationship between running economy (RE) and lower body flexibility. Thirty-four international-standard male distance runners (mean +/- s, age 27 +/- 5 years; body mass 64.9 +/- 4.2 kg; VO(2)max 72.8 +/- 3.7 ml x kg(-1) x min(-1)) gave written consent to participate in this study. The subjects performed an incremental treadmill test for the assessment of RE, lactate threshold and VO(2)max, and the sit-and-reach test was used to assess their general lower body and trunk flexibility. Running speeds below the lactate threshold were used to explore the relationship between running economy and sit-and-reach test performance. At 16.0 km x h(-1), the VO(2) was 50.6 +/- 3.7 ml x kg(-1) x min(-1) (range: 44.2 to 57.1 ml x kg(-1) x min(-1)). Pearson product moment correlation coefficients revealed no significant relationships between aerobic demand at 16.0 km x h(-1) and age (r = - 0.19), height (r = 0.15), body mass (r = - 0.18), or VO(2)max (r = - 0.004). However, there was a highly significant relationship between aerobic demand at 16.0 km x h(-1) and the sit-and-reach test score (r = 0.68; p < 0.0001). These results suggest that the least flexible runners are also the most economical. It is possible that stiffer musculotendinous structures reduce the aerobic demand of submaximal running by facilitating a greater elastic energy return during the shortening phase of the stretch-shortening cycle.
本研究的目的是调查跑步经济性（RE）与下肢柔韧性之间的关系。34名国际标准男子长跑运动员（平均±标准差，年龄27±5岁；体重64.9±4.2千克；最大摄氧量72.8±3.7毫升·千克⁻¹·分钟⁻¹）书面同意参与本研究。受试者进行了递增式跑步机测试以评估跑步经济性、乳酸阈值和最大摄氧量，并使用坐位体前屈测试来评估他们下肢和躯干的总体柔韧性。采用低于乳酸阈值的跑步速度来探究跑步经济性与坐位体前屈测试成绩之间的关系。在16.0千米·小时⁻¹时，摄氧量为50.6±3.7毫升·千克⁻¹·分钟⁻¹（范围：44.2至57.1毫升·千克⁻¹·分钟⁻¹）。皮尔逊积差相关系数显示，16.0千米·小时⁻¹时的有氧需求与年龄（r = -0.19）、身高（r = 0.15）、体重（r = -0.18）或最大摄氧量（r = -0.004）之间无显著关系。然而，16.0千米·小时⁻¹时的有氧需求与坐位体前屈测试得分之间存在高度显著的关系（r = 0.68；p < 0.0001）。这些结果表明，柔韧性最差的跑步者也是最经济的。肌肉肌腱结构较僵硬可能通过在拉长-缩短周期的缩短阶段促进更大的弹性能量回返，从而降低次最大强度跑步的有氧需求。
