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首页> 外文学位 >Effects of unilateral, isometric resistance training on strength development and the Hoffmann-reflex response in the trained and untrained limb.
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Effects of unilateral, isometric resistance training on strength development and the Hoffmann-reflex response in the trained and untrained limb.

机译：单侧等距阻力训练对受过训练和未经训练的肢体力量发展和霍夫曼反射反应的影响。

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摘要

The purpose of this study was to determine the effects of a 5-week unilateral, isometric strength-training program on presynaptic inhibition (PSI) and alterations in the H-reflex in both the trained and untrained limbs. Thirteen subjects, aged 23--42 years old, were assigned to either a control group (n = 6) or an exercise group (n = 7). Both groups were tested at the beginning and end of a 5-week interval on both limbs for maximal voluntary isometric contractions (MVIC) of the plantar flexors as well as three different conditioning protocols of the Soleus Hoffmann (H) reflex. Experimental group participants significantly increased MVIC in both legs following training (p 0.05) while control group participants showed no increase for either leg. Experimental subjects displayed increased normalized H-reflex values at M = 5% (HA) (p 0.05) in the trained leg only. Adaptations in HA for the trained limb in the presence of a substantial strength increase suggests that spinal mechanisms may partly explain the increase in strength, possibly due to increased alpha-motoneuronal excitability. However, the lack of HA increase in contralateral limb in the presence of a substantial strength increase, points to different neural mechanisms responsible for the cross education effect.
机译：这项研究的目的是确定为期5周的单侧等距力量训练计划对受过训练和未经训练的肢体突触前抑制（PSI）和H反射改变的影响。 13名年龄在23--42岁之间的受试者被分为对照组（n = 6）或运动组（n = 7）。两组均在5周间隔的开始和结束时在两肢上进行了for屈的最大自愿等距收缩（MVIC）以及Soleus Hoffmann（H）反射的三种不同的调节方案的测试。实验组参与者在训练后双腿的MVIC均显着增加（p <0.05），而对照组参与者则未显示任何一条腿的MVIC升高。实验对象仅在受过训练的腿中显示出M = 5％（HA）时归一化的H反射值增加（p <0.05）。在强度显着增加的情况下，HA对受训肢体的适应性变化表明，脊柱机制可能部分解释了强度的增加，这可能是由于α-运动神经元兴奋性增加所致。但是，在力量显着增加的情况下，对侧肢体的HA缺乏增加，这说明了负责交叉教育效果的不同神经机制。

著录项

  • 作者

    Lagerquist, Olle.;

  • 作者单位

    University of Victoria (Canada).;

  • 授予单位 University of Victoria (Canada).;
  • 学科 Education Physical.; Health Sciences Recreation.
  • 学位 M.Sc.
  • 年度 2004
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 预防医学、卫生学;
  • 关键词

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