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 &amp; lower limbs

Hyun, Seung-Hyun; Aeri, Lee; Ryew, Che-Cheong

doi:10.5103/kjsb.2014.24.1.043

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…The dynamic postural stability index (DPSI: ML, medial lateral; AP, anterior posterior; SI, stability index; V, vertical) was determined by the procedures described by Wikstrom et al (2005) and Hyun et al (2014) .…”

Section: Methodsmentioning

confidence: 99%

Effect of the kinetic variables and postural stability between bilateral in lower limbs by the Oreum trekking exercise: asymmetric index

Ryew

Hyun

2016

J Exerc Rehabil

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This study aimed to analyze an effect of the kinetic variables and postural stability between bilateral in lower limbs by participation of Oreum trekking exercise program and subjects participated were composed of adult male and female subjects (n=14) of 20s. Experiment was performed with the drop landing which can evaluate postural stability and kinetic variables between bilateral in lower limbs. peak vertical force (PVF) value showed significant difference with the less in case of post than before participation of Oreum trekking exercise. Also PVF of bilateral in lower limbs did not showed significant difference, and too the effect of interaction. vertical stability index (VSI) and dynamic postural stability index (DPSI) showed significant difference with improvement of postural stability by Oreum trekking, but did not between bilateral in the limbs. Particularly the result of one-way analysis of variance due to VSI’s effect of interaction, showed the more influence on the improvement of postural stability in left leg after participation of Oreum trekking exercise. When consideration the above, the analysis result on asymmetric index of bilateral in lower limbs showed more symmetric pattern in post than before participation of Oreum trekking exercise program.

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Section: Methodsmentioning

confidence: 99%

Effect of the kinetic variables and postural stability between bilateral in lower limbs by the Oreum trekking exercise: asymmetric index

Ryew

Hyun

2016

J Exerc Rehabil

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“…. Park, Lee, & Kim (2012) (Korovessis, Koureas, Zacharatos, & Papazisis, 2005;Korovessis, Koureas, & Papazisis, 2004;Negrini & Carabalona, 2002;Whittfield, Legg, & Hedderley, 2005 (Hyun, Lee, & Ryew, 2014;Riener, Rabuffetti, & Frigo, 2002), 평지보행에 비해 역학적 노력이 더 많이 요구된다 (Christina & Cavanagh, 2002). 이는 평지보행 시 수직지면반력 성분은 "M" 형태 (Perry, 1992) (Bhambhani, Buckley, & Maikala, 1997;Chow et al, 2005;Fiolkowski, Horodyski, Bishop, Williams, & Stylianou, 2006;Hall, Boyer, Cillette, & Mirka, 2013;Moon & Chun, 2013;Pascoe, D. D., Pascoe, D. E., Wang, Shim, & Kim, 1997;Smith et al, 2006) (Fiolkowski et al, 2006 (Munro, Miller, & Fuglevand, 1987…”

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

현승현¹,

류재청

2015

Korean Journal of Sport Biomechanics

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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 (COPx, 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, 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±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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“…. (Hyun, Lee, & Ryew, 2014) 154 Seung-Hyun Hyun · Che-Cheong Ryew 부하율(loading rate)은 단위 시간동안 가해지는 힘으로 Munro, Miller와 Fuglevand (1987)…”

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Investigation of the Ground Reaction Force Parameters According to the Shoe's heel Heights and Landing Distance during Downward Stairs on Bus

Hyun¹,

Ryew²

2014

Korean Journal of Sport Biomechanics

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The purpose of this study was to investigate the GRF(ground reaction force) parameters according to the shoes's heel heights and ground landing distances during downward stairs on bus. Participants selected as subject were consisted of young and healthy women(n=9, mean age: 21.30±0.48 yrs, mean height: 164.00±3.05 cm, mean body mass: 55.04±4.41 kg, mean BMI: 20.47±1.76 kg/m2, mean foot length: 238.00±5.37 mm). They were divided into 2-types of shoe's heel heights(0 cm/bare foot, 9 cm) and also were divides into downward stairs with 3 types of landing distance(20 cm, 35 cm, 50 cm). A one force-plate was used to collect the GRF(AMTI, USA) data from the sampling rate of 1000 Hz. The GRF parameters analyzed were consisted of the mediallateral GRF, anterior-posterior GRF, vertical GRF, loading rate, Center of Pressure(ΔCOPx, ΔCOPy, COP area) and Dynamic Postural Stability Index(MLSI, APSI, VSI, DPSI) during downward stairs on bus. Medial-lateral GRF and vertical GRF didn't show significant differences statistically according to the shoe's heel heights and landing distance, but 9 cm shoes heel showed higher vertical GRF than that of 0 cm bare foot in landing distance of 50 cm. Also anterior-posterior GRF didn't show significant difference statistically according to the shoe's heel heights, but landing distance of 20 cm showed higher than that of landing distances of 35 cm and 50 cm in anterior-posterior GRF. Loading rate didn't show significant difference statistically according to the landing distance, but 9 cm shoe's heel showed higher than that of 0 cm bare foot during downward stairs. The ΔCOPy and COP area didn't show significant differences statistically according to the shoe's heel heights and landing distance, but 0 cm bare foot showed higher than that of 9 cm shoe's heel in ΔCOPx. Dynamic Postural Stability Index(MLSI, APSI, VSI, DPSI) didn't show significant differences statistically according to the landing distance, but 9 cm shoe's heel showed decreased value than that of 0 cm bare foot in dynamics balance. Considering the above, parameters of GRF showed different characteristics according to the shoe's heel heights and ground landing distances during downward stairs on bus.

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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

Cited by 6 publications

References 37 publications

Effect of the kinetic variables and postural stability between bilateral in lower limbs by the Oreum trekking exercise: asymmetric index

Effect of the kinetic variables and postural stability between bilateral in lower limbs by the Oreum trekking exercise: asymmetric index

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

Investigation of the Ground Reaction Force Parameters According to the Shoe's heel Heights and Landing Distance during Downward Stairs on Bus

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