The aim of this study is to show the effect of starting block angle on the starting motion of sprinters using a crouching start. After installing starting blocks on forced platform, and having four highly comparative sprinters use the starting blocks,...
The aim of this study is to show the effect of starting block angle on the starting motion of sprinters using a crouching start. After installing starting blocks on forced platform, and having four highly comparative sprinters use the starting blocks, I analyzed the temporal valuables, segment position, center of mass position, segment angle movement, and the enforce amount imposed to the platform at the time of a crouching start. From the results of the analysis, the following conclusions could be drawn:
1. Each subject showed the shortest reaction time in each phase when the force platform angle was set as 50-55˚.
2. Subjects A, B, and C showed the fastest reaction time when the angle was raised by 10˚ from their free(+2) free style, and subject D at his free style 55˚.
3. The center of mass displacement was greater when starting block was set as 50-55˚.
4. There were differences of angle moment both in body's X, Y and Z axles and in the thigh's X axle, but not in the pelvis and lower leg.
5. The value of ground reaction force Fy and Fz was greater when the rear force platform angle was set as 50-55˚.