the max amplitude of frontal , right side and horizontal vector loop in the sports trained students is obviously higher than that in the common students (p0.05);
①运动训练专业大学生额面、右侧面和水平面心电向量最大振幅显着高于普通大学生(p0.05);
according to the deflection crank slider mechanism, the vector loop equations of its speed and acceleration are established in this paper.