Analysis of force profile during a maximum voluntary isometric contraction task
Analysis of force profile during a maximum voluntary isometric contraction task
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DOI：
10.1002/mus.10564
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发表时间：
2004-03-01
期刊：
影响因子：
3.4
通讯作者：
Swash, M
中科院分区：
文献类型：
--
作者：
Househam, E;McAuley, J;Swash, M
本研究分析了最大随意等长收缩（MVIC）和它的测量记录在最大努力，7秒的手握收缩的力量分布。6名健康受试者每人进行了3次短时间重复的试验，以研究疲劳的变化。这三项试验在三个独立的阶段每天进行，以观察随机变化。确定了试验期间的力发展模式。一个起始阶段，有或没有一个起始峰，随后是一个维持阶段，有时与二次脉冲和潜在的下降力。在这三个MVIC参数中，与试验间疲劳变异性相比，维持阶段的最大力显示出的随机变异性小于启动阶段的最大力或绝对最大力。MVIC作为一项任务，而不是一个单一的，最大值的分析揭示了更深层次的运动控制在其产生。因此，除了绝对最大力之外的力参数可能更适合于量化健康和疾病中的肌肉性能。
This study analyses maximum voluntary isometric contraction (MVIC) and its measurement by recording the force profile during maximal-effort, 7-s hand-grip contractions. Six healthy subjects each performed three trials repeated at short intervals to study variation from fatigue. These three trials were performed during three separate sessions at daily intervals to look at random variation. A pattern of force development during a trial was identified. An initiation phase, with or without an initiation peak, was followed by a maintenance phase, sometimes with secondary pulses and an underlying decline in force. Of these three MVIC parameters, maximum force during the maintenance phase showed less random variability compared to intertrial fatigue variability than did maximum force during the initiation phase or absolute maximum force. Analysis of MVIC as a task, rather than a single, maximal value reveals deeper levels of motor control in its generation. Thus, force parameters other than the absolute maximum force may be better suited to quantification of muscle performance in health and disease.