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The Effects of Chair Height and Foot Condition on the Biomechanical Factors in Sit-to-Stand Movement of Hemiplegic Patients

편마비 환자의 앉은 자세에서 일어서기 동작 시 의자 높이와 발의 조건이 생체역학적 요소에 미치는 영향

  • Kim, Dong-hoon (Dept. of Physical Therapy, The Graduate School, Hanseo University) ;
  • Kim, Tack-hoon (Dept. of Physical Therapy, Division of Health Science, Hanseo University) ;
  • Choi, Houng-sik (Dept. of Physical Therapy, Division of Health Science, Hanseo University) ;
  • Roh, Jung-suk (Dept. of Physical Therapy, Division of Health Science, Hanseo University) ;
  • Choi, Kyu-hwan (Dept. of Physical Therapy, Ansan University) ;
  • Kim, Ki-song (Dept. of Physical Therapy, College of Life&Health Sciences, Hoseo University)
  • 김동훈 (한서대학교 대학원 물리치료학과) ;
  • 김택훈 (한서대학교 보건학부 물리치료학과) ;
  • 최흥식 (한서대학교 보건학부 물리치료학과) ;
  • 노정석 (한서대학교 보건학부 물리치료학과) ;
  • 최규환 (안산대학교 물리치료학과) ;
  • 김기송 (호서대학교 생명보건대학 물리치료학과)
  • Received : 2017.12.26
  • Accepted : 2018.05.02
  • Published : 2018.05.21

Abstract

Background: It is very difficult for hemiplegic patients to effectively perform the sit-to-stand (STS) movements independently because of several factors. Moreover, the analysis of STS motion in hemiplegic patients has been thus far confined to only muscle strength evaluation with little information available on structural and environmental factors of varying chair height and foot conditions. Objects: This study aimed to analyze the change in biomechanical factors (ground reaction force, center of mass displacement, and the angle and moment of joints) of the joints in the lower extremities with varying chair height and foot conditions in hemiplegic patients while they performed the STS movements. Methods: Nine hemiplegic patients voluntarily participated in this study. Their STS movements was analyzed in a total of nine sessions (one set of three consecutive sessions) with varying chair height and foot conditions. The biomechanical factors of the joints in the lower extremities were measured during the movements. Ground reaction force was measured using a force plate; and the other abovementioned parameters were measured using an infra-red camera. Two-way repeated analysis of variance was performed to determine the changes in biomechanical factors in the lower extremities with varying chair height and foot conditions. Results: No interaction was found between chair height and foot conditions (p>.05). All measured variables with varying chair height showed a significant difference (p<.05). Maximum joint flexion angle, maximum joint moment, and the displacement of the center of mass in foot conditions showed a significant difference (p<.05); however the maximum ground reaction force did not show a significant difference (p>.05). Conclusion: The findings suggest that hemiplegic patients can more stably and efficiently perform the STS movement with increased chair height and while they are bare-foot.

Keywords

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