Biomechanical Analysis of Different rates for load and walking speed

• Main Authors: Chen Chun Chou, 陳俊舟
• Other Authors: Wong Zih-lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/35808485191478469502

碩士 === 國立臺北教育大學 === 體育學系碩士班 === 97 === The purpose of this study is to compare and analysis of the changes of the kinematical, dynamics parameters with three different rates for load (0％、10％、15％) and two different walking speed(105、142 footstep/min). The study samples are 10 male fifth-grade students (age: 11.34±0.72 years old, height: 151.78±6.48cm, weight: 50.98±9.75kg) . A Mega speed 25k high-speed camera (100Hz) and an AMTI force plate (1000Hz) are used to simultaneously capture kinematical, dynamics parameters during the experiment. Kinematical parameters are filmed through the camera, then the obtain film undergoes human limb sections of parameter organization system, Direct Linear Transformation and filter by the Kwon3D movement analysis software, in order to obtain the parameters such as gait cycle. The original signal from the force plate, processed by DASYLab 6.0 software to low-pass filtering (10Hz) and calibrate modular, calculates the original ground reaction forece. The resulting data undergoes two-way Anova statistics software, the level of significance for this experiment is set to α=.05. The result are: 一、 During the braking period, the action time would increase with the rate for load. On the other hand, the action time would decrease with the walking speed. 二、 During the braking period of the heel touchdown, the angle of the hip and the ankle would decrease with the rate for load. 三、 During the braking period, when the horizontal ground reaction force was maximal. 四、 When kicking up period, the angle of the ankle would decrease with the walking speed. 五、 During the standing period, the angle of the trunk forward inclination, the second largest vertical ground reaction force and the changes of the lower limbs stiffness would increase with the rate for load and the walking speed. 六、 During the standing period, the walking speed and the changes of the lower limbs stiffness. When the walking speed was 142 footstep/min, the change would increase obviously from the rate for load 10% to 0%. When the rate for load was 15%, the changes of the lower limbs stiffness would increase with the walking speed.