Relationship between the peak time of hamstring stretch and activation during sprinting
Relationship between the peak time of hamstring stretch and activation during sprinting
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DOI：
10.1080/17461391.2014.973913
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发表时间：
2016-01-02
影响因子：
3.2
通讯作者：
Fukubayashi, Toru
中科院分区：
文献类型：
--
作者：
Higashihara, Ayako;Nagano, Yasuharu;Fukubayashi, Toru
本研究的目的是研究在地上短跑时肌肉肌腱长度峰值与肌电图（EMG）激活之间的时间序列关系，以阐明每条腿筋肌肉拉伤发生率的风险。本文记录了13名男性短跑运动员在最大努力地上短跑时的全身运动学和右股二头肌、长头肌和半腱肌的肌电图。使用三维肌肉骨骼模型计算短跑期间的腿筋肌肉肌腱长度。测量肌肉肌腱长度的峰值时间，以跑步步态周期的百分比表示，并与肌电活动的峰值时间进行比较。腿筋肌肉的最大长度是在冲刺的后期摇摆阶段。BFlh肌的肌腱长度峰值与肌电图激活峰值同步，ST肌的肌腱长度峰值出现时间明显晚于肌电图激活峰值（p < 0.05）。这些结果表明，在冲刺的后期摇摆阶段，BFlh肌肉暴露于瞬时高张力，表明肌肉拉伤的风险更高。
The purpose of this study was to investigate the time series relationships between the peak musculotendon length and electromyography (EMG) activation during overground sprinting to clarify the risk of muscle strain injury incidence in each hamstring muscle. Full-body kinematics and EMG of the right biceps femoris long head (BFlh) and semitendinosus (ST) muscles were recorded in 13 male sprinters during overground sprinting at maximum effort. The hamstring musculotendon lengths during sprinting were computed using a three-dimensional musculoskeletal model. The time of the peak musculotendon length, in terms of the percentage of the running gait cycle, was measured and compared with that of the peak EMG activity. The maximum length of the hamstring muscles was noted during the late swing phase of sprinting. The peak musculotendon length was synchronous with the peak EMG activation in the BFlh muscle, while the time of peak musculotendon length in the ST muscle occurred significantly later than the peak level of EMG activation (p < 0.05). These results suggest that the BFlh muscle is exposed to an instantaneous high tensile force during the late swing phase of sprinting, indicating a higher risk for muscle strain injury.