Grabiner M D
Med Sci Sports Exerc. 1986 Feb;18(1):37-43.
Fifteen male subjects performed a series of unrestricted, unidirectional 45 degrees elbow extensions at three different initial muscle lengths and at four movement velocities. Online electromyography, accelerometry, and electrogoniometry were used in the data collection to investigate the relationship between the myoelectric activity during the electromechanical delay and various kinematic variables representing the concentric phase of the muscular contraction. Results indicate that the integral of the myoelectric signal during the electromechanical delay is a more reliable variable than the duration of the latency which was shown to be inconsistent in its ability to discriminate between manipulated conditions. It appears that the use of electromyographical quantification of the electromechanical delay can be useful in the derivation of preacceleration muscular force and perhaps provide an noninvasive technique to quantify the elastic characteristics of muscle and the contributions of the elastic response to movement.
15名男性受试者在三种不同的初始肌肉长度和四种运动速度下进行了一系列无限制的、单向的45度肘关节伸展运动。在数据收集过程中使用了在线肌电图、加速度测量法和电子测角法，以研究机电延迟期间的肌电活动与代表肌肉收缩同心相的各种运动学变量之间的关系。结果表明，机电延迟期间肌电信号的积分是一个比潜伏期持续时间更可靠的变量，后者在区分不同操作条件的能力上表现出不一致性。看来，使用肌电图对机电延迟进行量化，可能有助于推导加速前的肌肉力量，也许还能提供一种无创技术来量化肌肉的弹性特征以及弹性反应对运动的贡献。
