在实际投掷标枪时,较多时候能看到标枪在空中飞行的轨迹不是正弧线,而是呈“S”型弧线或“)”型弧线,即与投掷矢状线构成一个体。这种异常现象在标枪初学者或没有牢固的标枪基础的运动员普遍存在。“S”型弧线或“)”型弧线是在投掷方向上冠状面的影像,只有从投掷方向上才能清楚观察到,而在投掷方向的左右两侧是比较难看出甚至看不出来的,但可以观测到标枪抛物线的大 When the javelin is actually thrown, the javelin can often see the trajectory of the javelin flying in the air instead of the positive arc, instead of the “S” arc or the “” arc, that is, Constitute a body. This anomaly is prevalent in javelin beginners or athletes without a solid javelin base. The “S” arc or “)” arc is an image of the coronal plane in the throwing direction, which is clearly visible only in the direction of throwing, whereas left and right throwing directions are more difficult to see or even Can not see, but you can observe the large javelin parabola