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Analysis of the Ground Reaction Force Parameters According to the Change of Position and Weights of Bag during Downward Stairs Between Dominant and Non-dominant in Upper & lower limbs

계단내리기 시 우세·비우세 체지의 가방착용과 무게변화에 따른 지면반력 파라미터 분석

  • Hyun, Seung-Hyun (Department of physical education, College of Natural Science, Jeju National University) ;
  • Lee, Ae-Ri (Department of Leisure sports majors, Jeju Tourism College) ;
  • Ryew, Che-Cheong (Department of physical education, College of Natural Science, Jeju National University)
  • 현승현 (제주대학교 자연과학대학 체육학과) ;
  • 이애리 (제주관광대학 레저스포츠계열) ;
  • 류재청 (제주대학교 자연과학대학 체육학과)
  • Received : 2014.01.29
  • Accepted : 2014.03.12
  • Published : 2014.03.31

Abstract

The purpose of this study was to analyze of the GRF (ground reaction force) parameters according to the change of positions and weights of bag during downward stairs between dominant and non-dominant in upper & lower limbs. To perform this study, participants were selected 9 healthy women (age: $21.40{\pm}0.94yrs$, height: $166.50{\pm}2.68cm$, body mass: $57.00{\pm}3.61kg$, BMI: $20.53{\pm}1.03kg/m^2$), divided into 2 carrying bag positions (dominant arm/R, non-dominant arm/L) and walked with 3 type of bag weights (0, 3, 5 kg) respectively. One force-plate was used to collect GRF (AMTI OR6-7) data at a sample rate of 1000 Hz. The variables analyzed were consisted of the medial-lateral GRF (Fx), anterior-posterior GRF (Fy), vertical GRF (Fz), impact loading rate and center of pressure (COPx, COPy, COP area, COPy posterior peak time) during downward stairs. 1) The Fx, Fy, Fz, COPx, and COP area of GRF were not statistically significant between dominant leg and non-dominant leg, but non-dominant leg, that is, showed the higher COPy, and showed higher impact loading rate than that dominant leg during downward stairs. 2) In bag wearing to non-dominant arm, Fx, Fz, COPx, COPy, impact loading rate and COP area showed increase tendency according to increase of bag weights. Also, against bag wearing to dominant arm, non-dominant showed different mechanism according to increase of bag weights. The Ground Reaction Force parameters showed different characteristics according to the positions and weights of bag during downward stairs between dominant and non-dominant arm.

Keywords

References

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