R. Kuncoro Aji Laksono, Suharjana
The objective of this study was to obtain information about the effect of plyometric training on the sand and the land to football playerspower of the leg. It employed an experimental method with a 2 x 2 factorial design. The study population consisted of 30 football players. The total research sample was 16 players. The data collection techniques involve sprint tests and vertical jump tests. In this study, the subjects were taken using purposive sampling technique. Sampling with purposive sampling based on criteria or conditions, and has a specific purpose. The results of the study shows that. (1) There was a significant difference effect between plyometric training on the sand and the land to increase the lower leg power of the football players. The plyometric training methods on the sand was higher (good) with a mean value posttest of 7.125 compared to that on the land with a mean value posttest of 6.00. (2). There was a significant difference effect between players who have high speed and low speed with a mean value posttest of 55,625 better than low speed players with a mean value posttest of 53,625. (3) There was no significant interaction between the training methods (plyometric on the sand and the land) and speed (high and low) to increase the football players power of the leg. The results of the study concluded that (1) The plyometric training methods on the sand was more effective than the those on the land. (2) Players with high speed may obtain higher results was than those with low speed. © JPES.
Yogyakarta State University, Indonesia
