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The elbow is the load-bearing joint during arm swing

  • Bokku Kang (School of Mechanical Engineering, Kyungpook National University) ;
  • Gu-Hee Jung (Department of Orthopedic Surgery, Gyeongsang National University Changwon Hospital, Gyeongsang National University College of Medicine) ;
  • Erica Kholinne (Department of Orthopedic Surgery, Faculty of Medicine, Universitas Trisakti, St. Carolus Hospital) ;
  • In-Ho Jeon (Department of Orthopedic Surgery, Asan Medical Center, Ulsan University College of Medicine) ;
  • Jae-Man Kwak (Department of Orthopedic Surgery, Uijeongbu Eulji Medical Center, Eulji University College of Medicine)
  • Received : 2023.01.24
  • Accepted : 2023.04.02
  • Published : 2023.06.01

Abstract

Background: Arm swing plays a role in gait by accommodating forward movement through trunk balance. This study evaluates the biomechanical characteristics of arm swing during gait. Methods: The study performed computational musculoskeletal modeling based on motion tracking in 15 participants without musculoskeletal or gait disorder. A three-dimensional (3D) motion tracking system using three Azure Kinect (Microsoft) modules was used to obtain information in the 3D location of shoulder and elbow joints. Computational modeling using AnyBody Modeling System was performed to calculate the joint moment and range of motion (ROM) during arm swing. Results: Mean ROM of the dominant elbow was 29.7°±10.2° and 14.2°±3.2° in flexion-extension and pronation-supination, respectively. Mean joint moment of the dominant elbow was 56.4±12.7 Nm, 25.6±5.2 Nm, and 19.8±4.6 Nm in flexion-extension, rotation, and abduction-adduction, respectively. Conclusions: The elbow bears the load created by gravity and muscle contracture in dynamic arm swing movement.

Keywords

Acknowledgement

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. NRF-2021R1G1A1095581). This paper was supported by an EMBRI grant (2021-EMBRISN0008) from Eulji University. This study was supported by Eulji University in 2021.

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