Activation of the gluteus medius according to load during horizontal hip abduction in a one-leg stance.

  • Lee J
  • Kim Y
  • Koo H
  • 15

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Abstract

[Purpose] This study researched the influences of different loads on muscle activity of the posterior fibers of the gluteus medius in a one-leg standing position. [Subjects] Twenty-four healthy adult men participated in this study. [Methods] All participants performed the one-leg standing position under four conditions: the standard no-load condition, in which the non-weight-bearing leg was lifted and kept parallel to the back and then pelvic or lumbar rotation was performed without thorax rotation, and the 0 kg, 1 kg, and 3 kg load conditions, in which horizontal shoulder abduction was performed with a load of 0 kg, 1 kg, or 3 kg added to the hand. The electromyographic activity of the posterior fibers of the gluteus medius was measured using a wireless surface electromyography under all conditions. The electromyographic activity of each muscle under the four conditions during the one-leg stance was analyzed using one-way analysis of variance. [Results] The electromyographic activity of the posterior fiber of the gluteus medius was significantly increased under the 3 kg load condition compared with the no-load, 0 kg load, and 1 kg load conditions. [Conclusion] These findings indicated that muscle activation is affected by increases in load in the one-leg standing position. The load on the upper extremity influences the muscle activity of the contralateral lower extremity.

Author-supplied keywords

  • 18
  • 2
  • 2015
  • and was accepted may
  • apr
  • gluteus medius
  • horizontal hip abduction
  • load
  • posterior fibers of the
  • this article was submitted

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Authors

  • Jae-Woong Lee

  • Yeong-Ju Kim

  • Hyun-Mo Koo

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