A comparison of base running and sliding techniques in collegiate baseball with implications for sliding into first base

Purpose: The purpose of this study was to compare 4 techniques for arrival at a base after sprinting maximally to reach it: sliding head-first, sliding feet-first, running through the base without slowing, and stopping on the base. A secondary purpose of the study was to determine any advantage there may be to diving into first base to arrive sooner than running through the base.Methods: Two high-definition video cameras were used to capture 3-dimensional kinematics of sliding techniques of 9 intercollegiate baseball players. Another video camera was used to time runs from first base to second in 4 counterbalanced conditions: running through the base, sliding head-first, sliding feet-first, and running to a stop. Mathematical modeling was used to simulate diving to first base such that the slide would begin when the hand touches the base.Results: Based upon overall results, the quickest way to the base is by running through it, followed by head-first, feet-first, and running to a stop.Conclusion: There was a non-significant trend toward an advantage for diving into first base over running through it, but more research is needed,and even if the advantage is real, the risks of executing this technique probably outweigh the miniscule gain.

跳远最佳起跳角并非45°

跳远选手在助跑后能获得一个很大的水平速度．在起跳阶段需要产生一个垂直速度。在理想情况下．运动员希望在不损失任何水平速度的情况下产生一个尽可能大的垂直速度。但事实上．这是不可能实现的。要想获得垂直速度就必须消耗一定的水平速度。产生的垂直速度越大．水平速度的损耗相应地也会越大。因此．在产生垂直速度和维持水平速度之间寻找一个度是至关重要的。