短跑是发展速度素质的主要手段,也是掌握田径运动各项技术和提高运动成绩的基础。决定短跑运动成绩的因素是多方面的,如身体全面发展水平、专项素质水平、掌握短跑合理技术以及精神意志品质等。这些因素是互相联系互相制约的,但在跑的过程中,诸多因素都集中地表现在一定的步长与步频的配合上。很明显,跑时步子大,两脚交换频率快,速度就快,反之,速度就慢。因此,提高短跑速度的实质,就是使学生不断地加大步长或加快步频,使步长与步频合理地配合。但是,在教学实践中看到,在一 Sprint is the main means of developing speed and quality, and it is also the basis for mastering various techniques of track and field and improving athletic performances. The factors that determine the performance of sprint sports are many factors, such as the overall level of physical development, the level of special quality, master the reasonable skills of sprinting and the spirit of the will. These factors are linked to each other constraints, but in the running process, many factors are concentrated in a certain number of steps and pace of cooperation. Obviously, when running big step, two feet exchange fast, fast, on the contrary, the speed is slow. Therefore, the essence of increasing the speed of sprint is to enable students to step up or step up their paces step by step so that their steps and cadences work reasonably well. However, in teaching practice, I see