Physical Therapy Rehabilitation Science

korean Academy of Physical Therapy Rehabilitation Science (물리치료재활과학회)
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Comparison of Abdominal Muscle Activation Based on Hip Abduction Degree during Straight Leg Raise Exercise

  • Haeun Koo (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University) ;
  • Won-Seob Shin (Department of Physical Therapy, Graduate School of Health and Medicine, Daejeon University)
  • Received : 2023.12.06
  • Accepted : 2023.12.26
  • Published : 2023.12.31
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Abstract

Objective: The alteration in joint angle or position plays a crucial role in influencing muscle activities, given the diverse directions of muscle fibers. This diversity leads to the hypothesis that responses to loads applied from various angles will exhibit variability. To enhance the stability of abdominal muscles, this study examines the impact of hip abduction during straight leg raising on muscular activity. Design: Repeated Measures Design Methods: The equipment used was an electromyography measuring instrument and was attached to the dominant muscles in the rectus abdominis (RA) and external oblique abdominis (EO). The experiment was conducted three times at random with adducted hip position, neutral hip position, and wide abducted hip position. At each position, the maximum pressure of the individual was kept at 50% of the maximum pressure and measured three times for 7 seconds. Results: There was a significant difference in the activity of the RA muscle according to the degree of hip joint adduction during straight leg raising. There was also a significant difference in the activity of the EO muscle according to the degree of hip joint adduction during straight leg raising. Conclusions: This study have shown that the muscle activity of the abdominal muscles in the hip joint, as wide as the pelvis, is the highest, and the lowest in the hip joint adduction position. It is most effective to perform straight leg raise exercises that are stretched to the individual's pelvic width.

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Acknowledgement

이 논문은 2023학년도 대전대학교 교내학술연구비 지원에 의해 연구되었음

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