Biarticular leg muscles and links to running economy
Biarticular leg muscles and links to running economy
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DOI：
10.1055/s-2007-989372
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发表时间：
2008-08-01
影响因子：
2.5
通讯作者：
Binks, L.
中科院分区：
文献类型：
--
作者：
Heise, G.;Shinohara, M.;Binks, L.
在女性跑步者中，跑步经济性指数(（V) /每距离dotO(2)）与腿部肌肉的时间肌电图特征之间的关系被量化。16名女性在跑步机上以一定的速度跑步30分钟，这种速度设计的目的是让她们对自己的运动强度进行硬性评估。在跑步结束时，同时收集摄氧量、视频和肌电图数据。肌肉准时持续时间和准时共激活持续时间的测量从以下肌肉计算：腓肠肌、股外侧肌、股直肌和股二头肌。评估每距离(V) / dotO(2)与时间肌电图数据之间的非参数相关性。站立时更长的股直肌在线持续时间，以及站立时更长的股直肌-腓骨在线协同激活持续时间与更经济的跑步者显著相关(即，每距离的（V) / dotO(2)更低）。站立时双关节腿部肌肉的协同激活显然与跑步经济性有关，这种控制策略可能会产生更大的弹性能量回报。
Relationships between an index of running econonly ((V) over dotO(2) per distance) and the temporal electro-myographic characteristics of leg Muscles were quantified in female runners. Sixteen women performed a 30-min treadmill run at a speed designed to elicit a hard rating of perceived of exertion. Near the end of the run, oxygen uptake, video, and electromyographic data were collected simultaneously. Measures of muscle on-time durations, and on-time coactivation durations were calculated from the following muscles: gastrocnemius, vastus lateralis, rectus femoris, and biceps femoris. Nonparametric correlations between (V) over dotO(2) per distance and temporal electro-myographic data were evaluated. Greater ontime duration of rectus femoris during stance, and greater on-time coactivation duration of rectus femoris-gastrocnemius during stance were significantly associated with more economical runners (i.e., lower (V) over dotO(2) per distance). The coactivation of biarticular leg muscles during stance is clearly linked to running economy and this control strategy may elicit greater elastic energy return.