Change of the anabolic hormone response Co exercise and application to a healthy management system in female

本研究的目的是研究日本儿童步态的生物力学特征，并建立日本儿童的生物力学数据库和标准步态模式(平均运动模式)。对284名7~12岁学龄儿童(男141名，女143名)的步行过程进行了录像，并用二维运动分析方法进行了分析。研究结果如下：1.日本儿童步态特征：随着年级的增加，步速、步长和步频比(步长/步频)增大，步频减小。男生步行比大于女生，步频较女生小。步态模式从低年级的步频依赖模式转变为高年级的步长依赖模式。男孩比女孩更依赖于步长。男孩和女孩之间存在以下差异：在支撑阶段，男孩比女孩更多地伸展髋关节，这归因于躯干竖起更多，大腿在足部接触时向后倾斜较小。女孩的膝关节、小腿和足部的活动范围大于男孩。日本儿童的标准步态数据库和日本儿童的标准步态模式建立了以下变量作为日本儿童的数据库：行走速度、步长、步频、步行比、CG运动模式、关节和节段角的模式、关节扭矩和恢复腿的扭矩功率，每个年级和性别。在运动学数据的基础上，将平均运动模式作为标准运动，绘制在每个学校年级和性别的棒状图中。

The purposes of this study were to investigate biomechanical characteristics of the gait for the Japanese children and to develop biomechanical database and the standard gait pattern (averaged motion pattern) of the Japanese children. Walking of 284 school children, 141 boys and 143 girls, aged 7 to 12 yrs, was videotaped and analyzed by 2D motion analysis method. The results were summarized, as follows.Characteristics of the gait for the Japanese childrenWith increase in the school grade, walking speed, step length and walking ratio (step length / step frequency) increased but the step frequency decreased. The boys indicated larger walking ratio and small step frequency than those of the girls. The gait pattern changed a step frequency-dependent pattern in the lower school grade to a step length-dependent in the higher school grade. The boys were step length-dependent more than the girls. The following differences were observed between boys and girls : The boys extended the hip joint in the support phase more than the girls, which was attributed to more erected trunk and smaller backward lean of the thigh at the foot contact. The range of motion of the knee joint, shank and foot for the girls was larger than those of the boys. Effectiveness of mechanical energy utilization for walking speed increased in boys and girls with the increase in school grade.Database and the standard gait pattern of the Japanese childrenThe following variables were developed as database for the Japanese children : walking speed, step length, step frequency, walking ratio, CG motion pattern, patterns of the joint and segment angles, joint torques and torque powers of the recovery leg for every school grade and sex. Based on the kinematics data, the averaged motion patterns as the standard motion were drawn in the stick pictures for every school grade and sex.