短跑运动中步幅的大小直接影响短跑的速度,而步幅的大小,受运动员灵活性、下肢长短、下肢力量和跑的技术动作等因素的影响。将这些因素划分为可变量和不可变量。技术动作、灵活性、下肢力量等通过训练可以改进和提高的因素称可变量; The size of the stride in the sprint directly affects the speed of the sprint. The size of the stride is influenced by the flexibility of the athlete, the length of the lower extremity, the strength of the lower extremity, and the technical action of running. These factors are divided into variable and immutable. Factors such as technical motivation, flexibility, lower extremity strength, etc. that can be improved and improved through training are called variables;