Effect of various speeds on kinematic and kinetic factors during walking on a stair climbing machine
Shih, Jiping
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https://hdl.handle.net/2142/21487
Description
Title
Effect of various speeds on kinematic and kinetic factors during walking on a stair climbing machine
Author(s)
Shih, Jiping
Issue Date
1994
Doctoral Committee Chair(s)
Riccio, Gary E.
Department of Study
Kinesiology and Community Health
Discipline
Kinesiology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Applied Mechanics
Biology, Animal Physiology
Education, Physical
Language
eng
Abstract
The purpose of this project was to explore the interaction between kinematic and kinetic factors and to investigate whether this relationship is affected by different speed conditions (43, 60, 77 and 95 equivalent 8 inch steps/min) in walking on stair climbing machines. A secondary purpose was to determine if there were any differences in terms of kinematic and kinetic factors between experienced and inexperienced subjects.
The kinematic parameters included hip flexion angle, knee flexion angle, and pedal angle, and the kinetic parameters studied were maximum force applied on the pedal, maximum force applied on the handrails, maximum right hip moment and maximum right knee moment.
Twelve healthy male stair climbing machine users (seven experienced subjects and five inexperienced subjects) were tested in four different test conditions.
It was determined from the study that: (1) As the speed increased, there is an increase in the force applied on the pedal both in inexperienced and experienced people. (2) Between inexperienced and experienced people, the minimum pedal angle and the maximum hip extension angle are the two main kinematic parameters which shows significant difference. (3) For the inexperienced group people, the force applied on the pedal and the moment in knee joint are smaller than the experienced group people. But the inexperienced group people have a larger force applied on the handrail and larger moment in the hip joint. (4) It suggests that the handrails are critical to decrease the impact force and the moment in knee joint, but this increases the force applied on the handrail and the moment in the hip joint.
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