Effect of Plyometrics Hexagonal Drill and Zig-Zag Drill with Muscle Strength towards Leg Muscle Power and Vo2max of the Volleyball Extracurricular Members of SMA Negeri 5 Kota Magelang

Abstract

This research aims to determine: (1) the effect of hexagonal plyometrics and zig-zag drill training towards leg muscle power and vo2max, (2) the difference in the effect between high and low leg muscle strength towards leg muscle power and vo2max, and (3) the interaction between hexagon plyometrics training and zig-zag drill as well as leg muscle strength (high and low) towards leg muscle power and vo2max.This research method was an experiment with a 2x2 factorial design. In this research, the number of samples was for about 20 students who were selected by using purposive sampling. To measure leg muscle power, the researcher used the vertical jump instrument, for vo2max, used the bleep test (multi stage), and for leg muscle strength, used a leg dynamometer. The data analysis used a two-way ANOVA test with a significance level of 0.05. The results of this research are: (1) there is a significant difference in the effect of plyometrics hexagonal drill and zig-zag drill training towards leg muscle power and Vo2max of the volleyball extracurricular members, (2) there is a significant difference in the effect between low muscle strength and high muscle strength towards leg muscle power and Vo2max of the volleyball extracurricular members with a value < 0.05, and (3) there is no significant interaction between plyometrics training and leg muscle strength (high and low) towards leg muscle power and Vo2max of the volleyball extracurricular members with a value > 0.05.