加强三维转动意识训练提高人体运动机能

人体和刚体一样在空间可作三维运动．三维运动的物体有3个相互垂直的运动轴，有6个自由度．沿3个轴可作三个方向的直线运动，也可绕三轴转动或旋转．但在人体下支撑时三个轴直线方向的运动受到约束，可作三轴的转动或旋转，称为人体三维转动．三维转动是人体的运动技能，是人体运动时气血循环体液代谢的基础，也是人体一种运动规律．人体运动通过三维转动调动大群肌肉产生动力，又以转动的形式传递作功．体育运动时由于高速度大负荷约束了人体平时的运动条件，在约束力作用下人体三维转动必须经过训练才能完成，三维转动训练可提高人体运动机能．

Strengthen Concious Training of 3-Dimensional Rotationand Raise Sporting Functions Of the Human Body

3-dimensional rotation is one of the sporting skills of the human they, but peoplhave so far done lithe research about it. The reason why it is neglected is that the human they is anon-even object and it's difficult for its 3-dimensional forces to focus on the centre of gravity whilerotation. But in reality,the human they does 3-dimensional rotation just as do other objects,whichman has little realized. 3-dimensional rotation serves as the foundation of the human body-liquidsand bloob circulations when the human they is sporting. In physical sports, with 3-dimensionalrotation, the human they propuces rotating inertia forces that are combined into an internal resultantmoment while doing work at different rotating radii, ensuring a dynamic equilibrium within thebody, with stability in the centre of gravity, smoothness in performance, little internal consumptionand great momentum. This was put into the teaching-learning practice of Grades 94 and 96's girlstudents Physical Education Class and Qualification Test in 1995~1997 with satisfactory results.