Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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The Effects of Task Difficulty Controlled by Surface Condition During Bridging Exercise on Relative Multifidus Activation Ratio

교각 자세 운동 시 지지면 불안정성을 통한 과제 난이도가 다열근의 선택적 근활성도 비에 미치는 영향

  • Song, Eun-Ju (Dept. of Physical Therapy, The Graduate School, Daejeon University) ;
  • Choi, Jong-Duk (Dept. of Physical Therapy, College of Natural Science, Daejeon University)
  • 송은주 (대전대학교 보건스포츠 대학원 물리치료학과) ;
  • 최종덕 (대전대학교 자연과학대학 물리치료학과)
  • Received : 2011.06.10
  • Accepted : 2011.08.12
  • Published : 2011.09.17
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Abstract

The purpose of this study is to examine the activity ratios of global trunk muscles and local trunk muscles in relation to adjustments in the level of task difficulty while performing stability exercises in easily applied bridging lumbar stabilization exercise. Twenty healthy subjects performed bridging lumbar stabilization exercise while the level of task difficulty was plate was used in the same posture for all the exercises. EMG was used to examine the activity ratios of the global muscles and multifidus in relation to the level of task difficulty. Moreover, the activity ratios of the multifidus muscle, the erector spinae and the gluteus maximus muscle were measured. A one-way ANOVA with repeated measures was used, and a Bonferroni correction was conducted (${\alpha}$=.05). When the bridging lumbar stabilization exercise were performed at different difficulty levels, the activity of the multifidus muscle, which is a local muscle, was high in all three exercises. Also, compared to low intensity and intermediate intensity exercises, high intensity exercises showed more significant differences (${\alpha}$=.05). Among all the muscles, the multifidus showed the highest activity at intermediate intensity. Based on these results, we suggest that in the case of bridging lumbar stabilization exercise, low intensity or intermediate intensity exercises are more suitable and efficient for local muscle stabilization.

Keywords

References

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