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滑步推铅球是较难掌握的技术动作。主要问题是左腿摆幅小,没有力量,主要靠右腿蹬地,形成向上跳的现象;滑步时上体直起,造成身体重心离地太高,使滑步后身体重心不能落在右腿上,左腿落地不积极,右腿蹬地时转髋不积极,形成滑步停顿等. 在教学中我们应用栏架来帮助学生掌握技术,收到了较好的效果。其步骤: 一、将用皮筋代替栏板的低栏架放在投掷圈的直径上,栏板中间对准园心.练习者侧向或背向站在距园心约50至70厘米处.练习摆腿动作,以膝碰到皮筋为准(见图1).练习时,要求摆动腿的摆动要以髋关节为轴,上体要压紧. 二、去掉皮筋,栏筒右侧插一小竹竿,竿的上端至地面高1.2米左右,低栏架下横梁处放一小垫子(长
Sliding shot put is more difficult to master the technical action. The main problem is the small swing of the left leg, there is no strength, mainly by the right leg, to form the phenomenon of jumping upward; upper body straight when sliding, causing the body center of gravity is too high, so that the body center of gravity after sliding can not fall on the right Legs, left leg landing is not positive, when the right leg is turned to the hip is not active, forming a slide stop, etc. In teaching we use the bar to help students master the technology, received good results. The steps: First, the rubber band instead of the bar on the low bar on the throwing circle on the diameter of the middle of the bar aligned at the center of the practitioner lateral or back standing about 50 to 70 centimeters away from the center of the garden. Exercise leg swing action to the knee to meet the rubber band shall prevail (see Figure 1) Practice requires swinging the leg swing to the hip axis, the upper body to be compressed. Second, remove the rubber band, Small bamboo pole, the pole of the upper end of the ground about 1.2 meters high, low beams under the beam put a small mat