PENGARUH LATIHAN PLYOMETRIC TERHADAP DAYA LEDAK OTOT TUNGKAI PADA ATLET SEARIA AQUATIC PADANG

Abstract

This study aimed to determine the effect of plyometric training on leg muscle explosive power in athletes of SEARIA Aquatic Padang. The study used an experimental method with a One Group Pretest–Posttest Design. The population consisted of 89 athletes of SEARIA Aquatic Padang, while the sample comprised 10 male athletes selected using purposive sampling. Data on leg muscle explosive power were collected using the Vertical Jump Test and calculated using the Lewis Nomogram. The treatment consisted of a plyometric training program conducted for 16 sessions. Data analysis included the Liliefors normality test and Paired Sample t-test at a significance level of 0.05. The results showed that the mean vertical jump increased from 34.60 cm in the pretest to 39.30 cm in the posttest, an increase of 4.70 cm. The mean leg muscle explosive power increased from 692.82 W to 738.63 W, an increase of 45.81 W or approximately 6.61%. The Liliefors test indicated that the pretest and posttest data were normally distributed. The Paired Sample t-test produced t = 11.019, df = 9, and p < 0.001. Thus, plyometric training had a significant effect on leg muscle explosive power in SEARIA Aquatic Padang athletes.