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Differences in activation properties of the hamstring muscles during overground sprinting

机译：地上冲刺过程中muscle绳肌的激活特性差异

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摘要

The purpose of this study was to quantify activation of the biceps femoris (BF) and medial hamstring (MH) during overground sprinting. Lower-extremity kinematics and electromyography (EMG) of the BF and MH were recorded in 13 male sprinters performing overground sprinting at maximum effort. Mean EMG activity was calculated in the early stance, late stance, mid-swing, and late-swing phases. Activation of the BF was significantly greater during the early stance phase than the late stance phase (p < 0.01). Activation of the BF muscle was significantly lower during the first half of the mid-swing phase than the other phases (p < 0.05). The MH had significantly greater EMG activation relative to its recorded maximum values compared to that for the BF during the late stance (p < 0.05) and mid-swing (p < 0.01) phases. These results indicate that the BF shows high activation before and after foot contact, while the MH shows high activation during the late stance and mid-swing phases. We concluded that the activation properties of the BF and MH muscles differ within the sprinting gait cycle. (C) 2015 Elsevier B.V. All rights reserved.
机译：这项研究的目的是量化地面短跑期间股二头肌（BF）和内侧绳肌（MH）的激活。 BF和MH的下肢运动学和肌电图（EMG）被记录在13名男性短跑运动员中，他们以最大的努力进行了地面短跑。在初期，后期，中期和后期阶段计算平均EMG活性。在站立初期阶段，BF的激活明显大于站立后期阶段（p <0.01）。在挥杆中期的前半段，高炉肌肉的激活明显低于其他阶段（p <0.05）。相较于BF，MH在后期阶段（p <0.05）和中期摆动阶段（p <0.01）阶段具有更高的EMG激活（相对于其记录的最大值）。这些结果表明，BF在足部接触之前和之后均显示出高活化，而MH在后期姿势和挥杆中段期间均显示出高活化。我们得出结论，在短跑步态周期内，BF和MH肌肉的激活特性有所不同。 （C）2015 Elsevier B.V.保留所有权利。

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