Journal of Korean Physical Therapy Science (대한물리치료과학회지)

Korean Physical Therapy Science (대한물리치료과학회)
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Usability test of pulling cable exercise machine in the spinal cord injury disabled: Focusing on deriving improvement

척수 손상 장애인 대상 장애인용 풀링 케이블 운동기구의 사용성 평가: 개선점 도출을 중심으로

  • Sung Shin Kim (Dept. of Clinical Rehabilitation, Rehabilitation Research Institute, Korea National Rehabilitation Center) ;
  • Myo Jung Choi (Dept. of Clinical Rehabilitation, Rehabilitation Research Institute, Korea National Rehabilitation Center) ;
  • Hyosun Kweon (Dept. of Clinical Rehabilitation, Rehabilitation Research Institute, Korea National Rehabilitation Center) ;
  • Kwang Ok An (Dept. of Healthcare and Public Health, Rehabilitation Research Institute, Korea National Rehabilitation Center) ;
  • Young-Hyeon Bae (Dept. of Healthcare and Public Health, Rehabilitation Research Institute, Korea National Rehabilitation Center)
  • 김성신 (국립재활원 임상재활연구과 ) ;
  • 최묘정 (국립재활원 임상재활연구과 ) ;
  • 권효순 (국립재활원 임상재활연구과 ) ;
  • 안광옥 (국립재활원 건강보건연구과) ;
  • 배영현 (국립재활원 건강보건연구과)
  • Received : 2023.04.17
  • Accepted : 2023.08.30
  • Published : 2024.03.31
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Abstract

Background: Exercise equipments and assistive devices for the disabled are being developed, but improvements for usability are still needed. The purpose of this study was to improve and utilize the developed exercise equipment and assistance devices by conducting usability test for people with spinal cord injury. Design: Cross-sectional Study. Methods: Scenarios and usability indicators were derived by conducting a preliminary usability test, 5 non-disabled men and women aged 19 or older. In the scenario, a total of 9 tasks were sequentially performed, including 2 tasks of entry and exit, 5 tasks of assistance devices and weight stack adjustment, and 2 tasks of pre exercise and exercise. The usability indicators were task success (success or fail), execution time (sec), safety, and convenience. For safety, 7 questions (Likert scale, 1~5 point) related to safety, stability and hazard were derived, and for convenience, the system usability scale (SUS score) was used (range: 0~100, 50 percentile rank is 68 point). Results: As a result of the usability test of people with spinal cord injury, there was a large variation among subjects in the task of adjusting the position of the pulley and support in the execution time (11.64~25.44 seconds), and one person failed to adjust the pulley. The safety level showed a lower score (score = 3 points) than other items in the item of entrapment or skin pressure, and in the case of SUS, the average score was 64.5 points, which was close to the acceptable level. Conclusion: Through the usability test, it was confirmed that exercise equipment for the disabled needs improvement in operability, pinching, and pressure, and that it is necessary to develop an assistive device that provides unrestrained posture information (biofeedback) to maintain correct posture during exercise.

Keywords

Acknowledgement

본 연구는 보건복지부 지능형 재활운동체육 중개연구사업(#TRSRE-IN11)의 지원으로 쓰인 것임.

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