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Effects of Combined Exercise on Injury Risk Factors of Lower Extremity during Landing

아동의 복합운동이 착지 시 하지 손상요인에 미치는 영향

  • Ha, Sung-He (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Yoo, Si-Hyun (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Kim, Joo-Nyeon (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Gil, Ho-Jong (Department of Physical Education, Graduate School of Korea National Sport University) ;
  • Ryu, Ji-Seon (Department of Health and Exercise Science, College of Lifetime Sport of Korea National Sport University) ;
  • Yoon, Suk-Hoon (Department of Community Sport, College of Lifetime Sport of Korea National Sport University) ;
  • Park, Sang-Kyoon (Department of Physical Education, College of Sport Science of Korea National Sport University)
  • 하성희 (한국체육대학교 대학원 체육학과) ;
  • 류시현 (한국체육대학교 대학원 체육학과) ;
  • 김주년 (한국체육대학교 대학원 체육학과) ;
  • 길호종 (한국체육대학교 대학원 체육학과) ;
  • 류지선 (한국체육대학교 생활체육대학 운동건강관리학과) ;
  • 윤석훈 (한국체육대학교 생활체육대학 사회체육학과) ;
  • 박상균 (한국체육대학교 스포츠과학대학 체육학과)
  • Received : 2014.05.27
  • Accepted : 2014.06.25
  • Published : 2014.06.30

Abstract

The purpose of this study was to investigate the effect of combined exercise on injury risk factors of lower extremity during landing. Ten sports talented athletes participated in this study. Sports talented athletes participated in a combined exercise (sports talented exercise, coordination) for 16 weeks. A three-dimensional motion analysis was performed using eight infrared cameras (sampling rate of 100 Hz), one force plate, and electromyography system (sampling rate of 1000 Hz) during landing. Kinetic, and kinematics analysis including average impulsive force, angle of lower extremity, vertical stiffness, onset of muscle activation were calculated by Matlab2009a software. Paired t-test was performed at alpha=.05. The average impulsive force in landing phase was not statistically significant (t=-.748, p=.474). The hip joint angle was more decreased in post test compared to pre test (E1: t=2.682, p=.025, E2: t=5.609, p=.000, E3: t=2.538, p=.032). The knee joint (E1: t=-.343, p=.739, E2: t=1.319, p=.220, E3: t=.589, p=.570) and ankle joint (E1: t=.081, p=.937, E2: t=.784, p=.453, E3: t=.392, p=.704) angle were tended to decrease after combined exercise. The vertical stiffness was tended to decrease after combined exercise (t=1.972, p=.080). Onset of quadriceps femoris (t=.698, p=.503) and medial gastocnemius (t=1.858, p=.096) were tended to be faster than biceps femoris (t=-.333, p=.747) after combined exercise. Although thses findings were not statistically significant except on a hip joint angle, risk factors of lower extremity such as joint angle, vertical stiffness and onset of quadriceps femoris, medial gastrocnemius were positively changed after the combined exercise but an additional training for improved onset of biceps femoris would be required in the future.

Keywords

References

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