Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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Biomechanical Effects of Wearing Mouthguards during Drop Landing

드롭 착지동작 시 마우스가드 착용이 운동역학적 변인에 미치는 영향

  • Chae, Woen-Sik (Department of Physical Education, College of Education, Kyungpook National University) ;
  • Lee, Kyu-Bok (Department of Prosthodontics, School of Dentistry, Kyungpook National University) ;
  • Jung, Jae-Kwang (Department of Oral Medicine, School of Dentistry, Kyungpook National University) ;
  • Lee, Haeng-Seob (Department of Physical Education, Graduate School of Kyungpook National University) ;
  • Kim, Dong-Soo (Department of Physical Education, Graduate School of Kyungpook National University) ;
  • Jung, Jae-Hu (Department of Physical Education, Graduate School of Kyungpook National University)
  • 채원식 (경북대학교 사범대학 체육교육과) ;
  • 이규복 (경북대학교 치의학전문대학원 치과보철학 교실) ;
  • 정재광 (경북대학교 치의학전문대학원 구강내과학 교실) ;
  • 이행섭 (경북대학교 대학원 체육학과) ;
  • 김동수 (경북대학교 대학원 체육학과) ;
  • 정재후 (경북대학교 대학원 체육학과)
  • Received : 2013.11.02
  • Accepted : 2013.12.21
  • Published : 2013.12.31
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Abstract

The purpose of this study was to determine the biomechanical effect of wearing the mouthguard on the lower limb during drop landing. Nine male university students who have no musculoskeletal disorder were recruited as the subjects. Linear velocity, angular velocity, vertical GRF, loading rate, joint moment, and lower extremity muscle activity were determined for each subject. For each dependent variable, paired t-test was performed to test if significant difference existed between with mouthguard (WM) and without mouthguard (WOM) conditions (p<.05). The results showed that linear velocity, angular velocity, vertical GRF and loading rate were no significant difference between the two groups. The inversion moment of the ankle joint was increased in WM compared to WOM. Average IEMG values from BF, TA, and LG in WM were significantly greater than corresponding values in WOM during IP phase. This indicates that wearing mouthguard played a vital role in muscle tuning for maintaining joint stability of the lower limb and preventing injury.

Keywords

References

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