Temporal Coactivation of Abdominal Muscles During Dynamic Stability Exercises
Temporal Coactivation of Abdominal Muscles During Dynamic Stability Exercises
复制标题
动态稳定性练习期间腹部肌肉的时间协同激活
DOI：
10.1519/jsc.0b013e3181ce24c7
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发表时间：
2010
影响因子：
3.2
通讯作者：
Krista L Clarke Davidson
中科院分区：
文献类型：
--
作者：
C. Hubley‐Kozey;G. Hatfield;Krista L Clarke Davidson
Hubley-Kozey，CL，Hatfield，GL和Davidson，KC。动态稳定性运动中腹肌的时间协同激活。J Strength Cond Res 24（5）：1246-1255，2010-本研究的目的是确定腹部肌肉对腿部负荷运动方案的时间反应，以及在该方案期间能够和不能最小化腰-骨盆运动的肌肉之间是否存在差异。重点是仰卧双侧腿部负荷任务，包括幻灯片（4级）或没有幻灯片（5级）。33名健康受试者（平均年龄24岁）完成了任务，同时记录了5个腹肌部位的表面肌电图（EMG）。受试者根据其最小化腰-骨盆运动的能力被分配到稳定组或不稳定组。在时间和振幅归一化后，将肌电图波形输入模式识别程序，并计算每个主要模式的分数。四个主要模式解释了波形数据中90%的方差，这些主要模式捕获了平均模式、腿伸展阶段的相对幅度变化以及整个练习过程中形状的细微变化。发现主要模式的显著相互作用（p < 0.05）; 1，2和4评分;主要模式3评分的显著主效应（p < 0.05）。这些结果说明了在双侧腿部负荷任务期间腹壁肌肉激活之间的时间同步性;然而，与那些无法正确执行任务的人相比，那些能够最大限度地减少腰部骨盆运动的人在腿部抬起和腿部伸展阶段的激活模式变化较小。这些结果表明，需要集中精力协调招募腹壁肌肉的组织方式，而不是简单地增加激活强度的稳定训练。
Hubley-Kozey, CL, Hatfield, GL, and Davidson, KC. Temporal co-activation of abdominal muscles during dynamic stability exercises. J Strength Cond Res 24(5): 1246-1255, 2010-The purpose of this study was to determine abdominal muscle temporal responses to a leg-loading exercise protocol and if differences exist between those able and unable to minimize lumbar-pelvic motion during this protocol. The focus was a supine bilateral leg-loading task that incorporated a slide (level 4) or no slide (level 5). Thirty-three healthy subjects (mean age 24 years) completed the task while surface electromyograms (EMG) from 5 abdominal muscle sites were recorded. Subjects were assigned to stable or unstable groups based on their ability to minimize lumbar-pelvic motion. After time and amplitude normalization, electromyography waveforms were entered into a pattern recognition procedure and scores for each principal pattern were calculated. Four principal patterns explained 90% of variance in the waveform data, with these principal patterns capturing the mean pattern, the relative amplitude change during the leg-extension phase, and subtle changes in shape throughout the exercise. Significant interactions (p < 0.05) were found for principal patterns; 1, 2, and 4 scores; and significant main (p < 0.05) effects for principal pattern 3 scores. These results illustrate temporal synchrony among the abdominal wall muscle activation during the bilateral leg-loading tasks; however, there was less variability in the activation patterns during the leg-lift and leg extension-phases for those who were able to minimize lumbar-pelvic motion compared to those who were unable to perform the task correctly. These results illustrate the need to focus on coordinated recruiting of the abdominal wall muscles in an organized manner and not simply increasing the intensity of activation for stabilization training.