PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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Comparison of the Immediate Effects of the Assisting Method for Center of Body Weight on Vastus Medialis Oblique and Vastus Lateralis Muscle Activation Variables and Muscle Onset Time During Stair Ascending

체중심의 보조 방법에 따른 계단 오르기 시 안쪽넓은근과 가쪽넓은근의 근활성 변수들과 개시시간에 미치는 즉각적인 영향 비교

  • Ji-Won Shin (Department of Physical Therapy, Yonsei University ) ;
  • Sam-Won Yoon (Department of Physical Therapy, College of Health and Welfare, Woosong University)
  • 신지원 (연세대학교 물리치료학과) ;
  • 윤삼원 (우송대학교 보건복지대학 물리치료학과)
  • Received : 2023.03.08
  • Accepted : 2023.04.07
  • Published : 2023.04.30
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Abstract

Purpose: The aim of this study is to compare the immediate effects of weight-assisting methods on vastus medialis oblique (VMO) and vastus lateralis (VL) muscle activation, on the VMO/VL muscle activation ratio, and on muscle onset time in healthy subjects when ascending stairs. Methods: Healthy participants were randomly assigned to the belt group (n = 11), hand group (n = 11), and control group (n = 11). In the belt group, a belt was wrapped around the sacrum and pulled forward with both hands, moving the center of weight forward, while ascending stairs. The hand group grasped the hips with both hands and climbed stairs, assisting their weight from the rear and moving the center of weight backward, and the control group climbed the stairs without any intervention. Results: Muscle activation of the VMO decreased significantly after the intervention in the belt and hand groups, and activation of the VL muscle in both groups showed a greater decrease than that of the VMO muscle. Further, the VMO/VL muscle activation ratio increased significantly, with an improvement shown in the order of the belt group, hand group, and control group, while muscle onset time also improved in the order of the belt group, hand group, and control group. Conclusion: The belt group demonstrated the greatest effect across all dependent variables, confirming that in clinical practice, these two weight-assisting methods are more effective interventions during stair ascent for patients with knee joint instability, pain, and imbalance than no assistance.

Keywords

References

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