||Three-dimensional Dynamic Analysis of Treadmill Walking
Walking is one of the most basic movements of human beings. The study of walking has been researched for a long time, and it is important to find out mechanism about it. Treadmill is always used as a physical exercise facility in people's daily life. In recent years, the treadmill walking training method is being used gradually in such as sports engineering field or welfare engineering field, and it is generally considered to be effective on the human body. It is known that the treadmill is usually adjustable to get different speed or gradient for walking. However, the effect on the human body have not been known clearly. As a result, we do not know if it is useful as a training method. There is a traditional walking style named nanba-style walking, which is using different posture, in Japan. It is also assumed to be useful as a walking training method in the sports engineering field. Actually, the effects on the human body such joint moment have not been known clearly by a 3D biomechanical point of view. The purpose of this study is to quantify the changes of human body by different walking conditions on the treadmill. The normal-style experiment have been done. The changes of ground reaction force, the joint angle, joint moment and joint power of the limb have been evaluated by different speeds and gradients. Furthermore, evaluation about the nanba-style walking has also been made by nanba-style walking experiment. The contrasts between nanba-style and normal-style walking have been made. There are 9 chapters in this paper. In the Chapter 1, the study background, aim are described. Considering the different professional background knowledge, the walking cycle and the nanba-style walking are also described. In addition, the research method is also described in this chapter. In this study, a motion capture system, an adjustable treadmill and wearable force plates were used to measure the human walking. Then a 3D inverse dynamics model was utilized to calculate the joint angle, moment and power. Next, the change of peak values have been evaluated. In the Chapter 2, the 3D inverse dynamic model is described in detail, which is used to calculate the 3D parameter. The inverse dynamic analysis and rigid body link model are described in this chapter. In the Chapter 3, the measurement experiments are described. In this study, there are 2 measurement experiments. First, the normal-style walking experiment has been processed for evaluation about the change by different speeds or gradients. Second, the nanba-style walking measurement experiment has been processed for evaluation about the change between the normal-style and nanba-style walking. In addition, the experimental facilities and software are described in this chapter. The result and discussion of two measurement experiments about the ground reaction force (GRF), joint angle, joint moment and joint power are described from Chapter 4 to Chapter 8. The evaluation about the peak values have been processed, and the graphs are shown in these chapters. In the result, the peak values of the ground reaction force (GRF) is always becoming larger by faster walking speed. It is thought that the human body (foot) need to support more much force for walking and keeping balance. There are much effect on joint angle by different gradients. In addition, the statistical test has also been done, which is descried in detail in these chapters. In the Chapter 9, the conclusion and the future study are described.
首都大学東京, 2017-03-25, 修士（工学）