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摘要人体落地是一项人体运动中的基本动作，因此前人对它的研究是深入而广泛，但纵观所有文献大多数都是以20cm、40cm、60cm的高度来进行测试，同时这些研究主要从运动学和动力学角度分析下落过程中髋、膝、踝关节的活动情况和地面反作用力的变化情况，但少有结合肌电的活动分析落地过程中下肢的变化。
本研究主要将利用红外立体动作捕捉系统和表面肌电图采集系统对人体从25cm、50cm、75cm的高度落下和不同方式着地的下肢相关肌肉的活动情况进行分析研究。在双脚落地时，胫骨前肌活动明显强于腓肠肌；而在单脚落地中，腓肠肌肌电明显强于胫骨前肌。依据解剖学角知识，胫骨前肌的收缩将会引起踝关节背屈（勾脚尖），而腓肠肌的活动将会引起踝关节跖屈（绷脚尖），由此可以反映在双脚着地时是脚后跟着地发力支撑，而单足落地却是脚前掌着地发力支撑。以期通过此研究能够加深对不同高度下落中不同方式着地的下肢肌肉活动的了解，为后人的研究提供相应的参考依据。43991
Abstract
The human body is a basic action landing in human motion, so the previous studies it is deep and wide, but most of the literatures are all tested by 20cm, 40cm, 60cm, at the same time, these studies are mainly from the perspective of kinematics and dynamics analysis of the whereabouts of Cheng Zhongkuan, knee, ankle joint activities and ground reaction force changes, but little change with the EMG activity analysis of lower extremity landing process.
Capture system and surface EMG acquisition system this study will use infrared stereo motion analysis of human body from 25cm, 50cm, 75cm height and different ways to the lower limb muscle activity. The landing legs, anterior tibial muscle activity was stronger than the gastrocnemius; while in the single foot landing, gastrocnemius muscle EMG was stronger in anterior tibial muscle. Based on anatomical knowledge angle, anterior tibial muscle contraction will cause ankle dorsiflexion (hook toes), and gastrocnemius muscle activity will cause ankle plantar flexion (pointed toes), which can be reflected in the feet when the foot heel support force, and the single foot landing is a force to support the front foot palm. Through this research can deepen our understanding of the different height in different ways to the understanding of lower extremity muscle activity, provide reference for future research.
毕业论文关键词：青年男子、不同高度落地、不同方式落地、肌电
Key words: young man, different height, different ways of landing, landing EMG
目 录
摘要 2
1前言 6
2研究方法
2.1文献资料法 6
2.2专家访谈法 7
2.4实验法 7
2.3.1实验对象 7
2.3.2实验器材 7
2.3.2.1运动学捕捉系统 7
2.3.2.2三维测力台 8
2.3.2.3运动学和动力学信号采集软件 8
2.3.2.4人体运动生物力学分析软件 9
2.3.2.5肌电图信号分析系统 9
2.3.2.6实验所用物品 10
2.3.3实验流程 11
2.3.3.1实验前的准备工作 11
2.3.3.2贴放marker点 11
2.3.3.3肌肉的选取及贴放位置