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Study aim
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The purpose of this study is to evaluate the effect of varying prosthetic mass and prosthetic knee location on dynamic stability in unilateral above knee amputees during walking.
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Design
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In this study,fifteen unilateral above knee amputees that met all of the inclusion criteria will participate.
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Settings and conduct
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This study will be conducted at school of rehabilitation sciences. Dynamic stability of the subjects will evaluate in 4 different conditions. 1-no additional mass, 2- Moving knee mass down by 18.35 % of the total shank length, 68% decrease in the shank mass, 7.3% increase in the thigh mass, 3- Moving knee mass down by 36.7 % of the total shank length, 68% decrease in the shank mass, 7.3% increase in the thigh mass, 4-17% increase in the thigh mass, 38% decrease in the shank mass. All participants will carry out four conditions in different sequences and will provided 3-5 min rest break between the tests.. For each of the four conditions, the subjects will be asked to walk at a comfortable speed along a 77.7 m walkway.
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Participants/Inclusion and exclusion criteria
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Unilateral above knee amputees aged 20 to 60 years old, without history of neurological disorders and cardiovascular abnormalities will participate in the study.
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Intervention groups
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1-No additional mass,
2- Moving knee mass down by 18.35 % of the total shank length, 68% decrease in the shank mass, 7.3% increase in the thigh mass,
3- Moving knee mass down by 36.7 % of the total shank length, 68% decrease in the shank mass, 7.3% increase in the thigh mass,
4-17% increase in the thigh mass, 63% decrease in the shank mass.
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Main outcome variables
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Dynamic stability