Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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The Effect of Asymmetric Muscle Force in the Lower Extremity on Dynamic Balance on during Drop Landing

하지근력의 좌우 비대칭성이 드롭랜딩 시 동적 안정성에 미치는 영향

  • Kim, Chul-Ju (Department of Physical Education, College of Physical Education, Chosun University) ;
  • Lee, Kyung-Il (Department of Physical Education, College of Physical Education, Chosun University) ;
  • Hong, Wan-Ki (Department of Physical Education, Graduate School of Chosun University)
  • 김철주 (조선대학교 체육대학 체육학부) ;
  • 이경일 (조선대학교 체육대학 체육학부) ;
  • 홍완기 (조선대학교 대학원 체육학과)
  • Received : 2011.04.29
  • Accepted : 2011.06.21
  • Published : 2011.06.30
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Abstract

This study aims to analyse difference in biomechanical factors between dominant legs and recessive ones according to muscular imbalance during drop landing targeting talented children in sports. The subjects of the study were ten primary students who are attending to Sports Program for Talented Children organized by C university (age: $12.28{\pm}0.70$ year, height: $1.52{\pm}0.11$ m, and weight: $45.2{\pm}4.9$ kg). Strength legs were classified into dominant side and strengthless legs were classified into non-dominant legs. For three-dimensional analyses of the data collected, 6 video cameras(MotionMaster200, Visol, Korea) were used. To analyse ground reaction force, two force platforms(AMTI ORG-6, MA) were used and to analyse electromyograghy a 8-channeled wireless Noraxon Myoresearch made in USA was used at 1000 Hz for sampling. As a result, it was discovered that the dominants legs controlled knee bending motions more stably than strengthless legs as the maximum vertical ground reaction force was significantly high in dominant legs(p<.05), and joint moment of knee joints of the dominant legs was high(p<.05). Therefore, this study suggested that injury prevention program focusing on muscular balance as well as the existing sports programs for talented children should be developed based on results of the study and it is expected that the results will be useful for improvement of sports programs for talented children.

Keywords

References

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