한국운동역학회지 (Korean Journal of Applied Biomechanics)

  • 제25권1호
  • /
  • Pages.85-94
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  • 2015
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  • 1226-2226(pISSN)
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  • 2093-9752(eISSN)
한국운동역학회 (Korean Society of Applied Biomechanics)
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계단 오르기와 내리기 시 가방착용 위치가 지면반력 파라미터에 미치는 영향

Influence on the Ground Reaction Force Parameters According to Wearing Positions of Backpacks During Stair Ascending and Descending

  • 현승현 (제주대학교 자연과학대학 체육학과) ;
  • 류재청 (제주대학교 자연과학대학 체육학과)
  • Hyun, Seung-Hyun (Department of physical education, College of Natural Science, Jeju National University) ;
  • Ryew, Che-Cheong (Department of physical education, College of Natural Science, Jeju National University)
  • 투고 : 2015.01.19
  • 심사 : 2015.03.27
  • 발행 : 2015.03.31
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초록

Purpose : The purpose of this study was to investigate the influence on the ground reaction force parameters according to wearing positions of backpack for during stair ascending and descending. Methods : Participants selected as subject were consisted of young female(n=10) and performed stairs walks(ascending and descending) with 2 types of wearing position(front of trunk[FT], rear of trunk[RT]). Passive(Fz 1) and active(Fz 2) forces of the vertical GRF were determined from time function and frequency domain. Also shear forces(Fx, Fy 1, Fy 2), dynamic postural stability index(MLSI, APSI, VSI, DPSI), loading rate and center of pressure (${\Delta}COPx$, ${\Delta}COPy$, COP area) were calculated from time function and frequency domain. Results : Fx, Fy 1, Fy 2, and Fz 1 in GRF didn't show significant differences statistically according to the wearing positions of backpack(p>.05), but stair descending showed higher forces than that of stair ascending. Particularly, Fz 2 of stair ascending showed higher forces than that of stair descending(p<.001), RT types showed higher than that of FT types(p<.05). MLSI, APSI, VSI, and DPSI of stair descending showed the increased stability index than that of stair ascending(p<.05), MLSI of RT types showed the decreased stability index than that of FT types(p<.05). Loading rate didn't show significant differences statistically according to the wearing positions of backpack(p>.05), but stair descending showed higher loading rate than that of stair ascending(p<.001). Also, ${\Delta}COPx$ in stair descending showed the increased movement than that of stair ascending(p<.05). Conclusions : A backpack of 10 kg(10 kg(ratio of body weights $17.61{\pm}1.17%$) showed significantly change GRF parameters according to wearing positions during stair ascending and descending. If possible, we suggest that the dynamic stability, in case of stairs walking with a smaller weights can be further improved.

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참고문헌

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피인용 문헌

  1. The Theta Analysis on the Components of Ground Reaction Force According to the Ground Conditions During Gait vol.25, pp.3, 2015, https://doi.org/10.5103/KJSB.2015.25.3.241