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Muscle Activity of Primary and Core Muscles of Seated Overhead Press with Unstable Load

机译：负荷不稳定的坐式高架卧推器主要和核心肌肉的肌肉活动

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摘要

Core muscle strength and coordination are important components to resistance training and sports performance. Unstable training (UT), further divided into unstable surface training (UST) and unstable load training (ULT), is commonly chosen to improve core muscle strength. ULT has been accomplished by suspending resistance from a barbell with bands, allowing it to move vertically, but research has not been done on a horizontal type of ULT. The purpose of this study was to measure the impact of horizontal dynamic instability (HDI) on prime mover and core stabilizer muscle activity, during the seated overhead press, through use of electromyography (EMG). HDI was compared to a traditional type of ULT as well as stable load training (SLT). Thirteen resistance trained males (age = 24.1+/-2.4 years, height = 178+/-7.2cm, mass = 84.1+/-9.4 kg) participated in all three condition assignments. Subjects tested their 5-RM strength on the seated overhead press and performed five repetitions at 50% 5-RM strength for condition assignments. Electrodes were attached to 8 muscles (anterior deltoid, triceps brachii, upper trapezius, right & left external oblique, right & left rectus abdominis, erector spinae). Concentric and eccentric muscle actions were analyzed separately across all repetitions. Mean voltage of activation was acquired and processed (band pass filter 10--500 Hz, rectified, RMS 50ms window and normalized) and significance was set at p <0.05. A two-way RM ANOVA was used to compare condition x muscle action. Anterior deltoid and upper trapezius activity was higher during ULT concentric compared to SLT and HDI concentric. Erector spinae activity was higher during SLT and HDI concentric compared to ULT concentric. Left external oblique activity differed significantly between HDI and ULT eccentric, but no differences occurred at the right external oblique. These results suggest that HDI may require external oblique activity to a similar magnitude as traditional ULT. Continued research on HDI should address other exercises or loading intensities.
机译：核心肌肉的力量和协调性是阻力训练和运动表现的重要组成部分。不稳定训练（UT）通常被选择为不稳定表面训练（UST）和不稳定负荷训练（ULT），以提高核心肌肉的力量。 ULT是通过悬挂带状杠铃的阻力来使其垂直移动来实现的，但尚未对水平ULT进行研究。这项研究的目的是通过使用肌电图（EMG）来测量坐式高架卧推过程中水平动态不稳定性（HDI）对原动机和核心稳定器肌肉活动的影响。将HDI与传统ULT和稳定负荷训练（SLT）进行了比较。参加这三个条件分配的十三个抵抗训练男性（年龄= 24.1 +/- 2.4岁，身高= 178 +/- 7.2cm，体重= 84.1 +/- 9.4 kg）。受试者在高架卧推机上测试其5-RM强度，并以50％5-RM强度进行五次重复以进行条件分配。电极连接到8块肌肉（前三角肌，肱三头肌，上斜方肌，右和左外斜肌，右和左腹直肌，竖脊肌）。在所有重复中分别分析了同心和偏心肌肉动作。获取并处理平均激活电压（带通滤波器10--500 Hz，已整流，RMS 50ms窗口并归一化），显着性设置为p <0.05。双向RM方差分析用于比较状况x肌肉动作。与SLT和HDI同心相比，ULT同心期间前三角肌和上斜方肌活动较高。与ULT同心相比，SLT和HDI同心期间的竖脊肌活动较高。 HDI和ULT偏心轮之间的左外斜肌活动差异显着，但右外斜肌无差异。这些结果表明，HDI可能需要外部倾斜活动，其程度与传统ULT相似。对HDI的持续研究应解决其他问题或负荷强度。

著录项

  • 作者

    Reynolds, Travis.;

  • 作者单位

    The University of Toledo.;

  • 授予单位 The University of Toledo.;
  • 学科 Physiology.;Physics.;Medicine.
  • 学位 M.S.
  • 年度 2017
  • 页码 84 p.
  • 总页数 84
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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