The Effect of Jump To Box Plyometric Training On The Explosive Power of Leg Muscles In Volleyball Players
Keywords:
Plyometric Training; Jump to Box; Leg Muscle Explosive Power; Volleyball Players; Vertical Jump TestAbstract
This study aimed to examine the effect of jump to box plyometric training on the explosive power of leg muscles in volleyball players of the Asoka Club, Morowali Regency. The research employed a quantitative experimental approach using a One-Group Pretest–Posttest Design, which allowed direct comparison of athletes’ performance before and after the training intervention. The independent variable in this study was jump to box plyometric training, while the dependent variable was leg muscle explosive power. The sample consisted of 25 female volleyball players who were actively involved in training and competition at the Asoka Volleyball Club and met the predetermined inclusion criteria. Leg muscle explosive power was measured using the vertical jump test, which is widely recognized as a valid and reliable indicator of lower-limb power. Data were analyzed using paired sample t-test with the assistance of SPSS software. The results revealed a statistically significant improvement in leg muscle explosive power following the implementation of jump to box plyometric training. The statistical analysis showed that the t-count value (17.018) was significantly higher than the t-table value (1.71088) at a 5% significance level with 24 degrees of freedom, indicating rejection of the null hypothesis. Furthermore, the mean increase in test scores was 7.88 points, with total scores rising from 845 in the pretest to 1,044 in the posttest. These findings demonstrate that jump to box plyometric training is an effective and efficient training method for enhancing leg muscle explosive power in volleyball players. The study provides empirical evidence supporting the application of plyometric training in volleyball conditioning programs, particularly for improving jumping ability and performance-related movements such as spiking and blocking.
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