Effects of Load and Gradient on Energy Cost of Running
Effects of Load and Gradient on Energy Cost of Running
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DOI：
10.2114/jpa2.30.153
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发表时间：
2011-07-01
影响因子：
3.1
通讯作者：
Niihata, Shigemitsu
中科院分区：
文献类型：
--
作者：
Abe, Daijiro;Fukuoka, Yoshiyuki;Niihata, Shigemitsu
本研究量化了从股外侧肌获得的肌电图（EMG）和跑步的代谢能量消耗（C（r）; mL）的相互作用。[mass+ load]（-1）。米（-1）），跑经济性的艺术指标。实验进行了有和没有负载的背部上的电动机驱动的跑步机上的下坡，水平和上坡。将获得的EMG进行全波整流和积分（iEMG）。iEMG分为偏心（ECC）和同心（CON）阶段与脚传感器和膝关节测角器。以ECC/CON比值（ECC/CON ratio）作为在各坡度上跑步时肌肉弹性能力的指标。Cr被确定为2分钟稳态O（2））与运行速度的比率。我们发现，在所有斜坡上承载载荷时，Cr显著降低。ECC/CON比显着较高的负载条件下，在下坡和水平的斜坡，但不是在上坡。在C（r）（向下）中观察到显著的梯度差异
This study quantified the interaction of electromyography (EMG) obtained from the vastus lateralis and metabolic energy cost of running (C(r); mL . [mass+ load](-1) . meter(-1)), art index of running economy, during submaximal treadmill running. Experiments were conducted with and without load on the back on a motor-driven treadmill on the downhill, level and uphill slopes. The obtained EMG was full-wave rectified and integrated (iEMG). The iEMG was divided into eccentric (ECC) and concentric (CON) phases with a foot sensor and a knee-joint goniometer. The ratio of ECC to CON (ECC/CON ratio) was regarded as the muscle elastic capacity during running on each slope. The Cr was determined as the ratio of the 2-min steady-state O(2)) to the running speed. We found a significant decrease in the Cr when carrying the load at all slopes. The ECC/CON ratio was significantly higher in the load condition at the downhill and level slopes, but not at the uphill slope. A significant gradient difference was observed in the C(r) (down