Mechanomyographic and electromyographic time and frequency domain responses during submaximal to maximal isokinetic muscle actions of the biceps brachii
Mechanomyographic and electromyographic time and frequency domain responses during submaximal to maximal isokinetic muscle actions of the biceps brachii
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DOI：
10.1007/s00421-004-1110-9
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发表时间：
2004-07-01
影响因子：
3
通讯作者：
Malek, MH
中科院分区：
文献类型：
--
作者：
Beck, TW;Housh, TJ;Malek, MH
本研究的目的是确定肱二头肌等速肌肉动作过程中的机械肌电（MMG）和肌电图（EMG）振幅和平均功率频率（MPF）与扭矩的关系。12名成年人[平均（SD）年龄，22.2（2.7）岁]进行次最大至最大等速肌肉动作的优势前臂屈肌。在确定等速峰值扭矩（PT）后，受试者随机进行次最大肌肉动作，从20%到80%PT，增量为20%。多项式回归分析表明，MMG（r（2）=0.984）和EMG（r（2）=0.988）振幅线性增加至100% PT。然而，MMG和EMG MPF与等速扭矩之间无显著（P>0.05）关系。结果表明，MMG和EMG在时域和频域中的响应相似。这些研究结果表明，MMG和EMG振幅和MPF的同时检查可能有助于描述调制动态扭矩产生的独特的电机控制策略。此外，结果表明，动态肌肉动作时，可以使用应用技术，需要一个线性的EMG振幅与扭矩的关系。
The purpose of this investigation was to determine the mechanomyographic (MMG) and electromyographic (EMG) amplitude and mean power frequency (MPF) versus torque relationships during isokinetic muscle actions of the biceps brachii. Twelve adults [mean (SD) age, 22.2 (2.7) years] performed submaximal to maximal isokinetic muscle actions of the dominant forearm flexors. Following determination of isokinetic peak torque (PT), the subjects randomly performed submaximal muscle actions in 20% increments from 20% to 80% PT. Polynomial regression analyses indicated linear increases in both MMG (r(2)=0.984) and EMG (r(2)=0.988) amplitude to 100% PT. There were no significant (P>0.05) relationships, however, for MMG and EMG MPF versus isokinetic torque. The results demonstrated similar responses for MMG and EMG in both the time and frequency domains. These findings suggested that simultaneous examination of MMG and EMG amplitude and MPF may be useful for describing the unique motor control strategies that modulate dynamic torque production. Furthermore, the results indicated that dynamic muscle actions can be used when applying techniques that require a linear EMG amplitude versus torque relationship.