論文

査読有り
2018年3月

Lumbar lordosis angle and trunk and lower-limb electromyographic activity comparison in hip neutral position and external rotation during back squats.

Journal of physical therapy science
  • Tomoki Oshikawa
  • ,
  • Yasuhiro Morimoto
  • ,
  • Koji Kaneoka

30
3
開始ページ
434
終了ページ
438
記述言語
英語
掲載種別
DOI
10.1589/jpts.30.434

[Purpose] To compare the lumbar lordosis angle and electromyographic activities of the trunk and lower-limb muscles in the hip neutral position and external rotation during back squats. [Subjects and Methods] Ten healthy males without severe low back pain or lower-limb injury participated in this study. The lumbar lordosis angle and electromyographic activities were measured using three-dimensional motion-capture systems and surface electrodes during four back squats: parallel back squats in the hip neutral position and external rotation and full back squats in the hip neutral position and external rotation. A paired t-test was used to compare parallel and full back squats measurements in the hip neutral position and external rotation, respectively. [Results] During parallel back squats, the average lumbar lordosis angle was significantly larger in hip external rotation than in the hip neutral position. During full back squats, lumbar erector spinae and multifidus activities were significantly lower in hip external rotation than in the hip neutral position, whereas gluteus maximus activity was significantly higher in hip external rotation than in the hip neutral position. [Conclusion] The back squat in hip external rotation induced improvement of lumbar kyphosis, an increasing of the gluteus maximus activity and a decrease of both lumbar erector spinae and multifidus activities.

リンク情報
DOI
https://doi.org/10.1589/jpts.30.434
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29581666
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5857453