The Effect Of Plyometric Training (Box Jump) On Leg Muscle Strength In Volleyball Players
DOI:
https://doi.org/10.26858/cpjok.v18i2.882Keywords:
Plyometric Training; Box Jump; Leg Muscle Strength; Volleyball Players; Physical ConditioningAbstract
Lower-limb muscle strength is one of the most important physical components in volleyball because it directly influences athletes’ ability to perform explosive movements such as jumping, spiking, blocking, and jump serving. However, observations at KKS Bambalamotu Volleyball Club indicated that the players’ leg muscle strength had not yet reached an optimal level, necessitating an effective training intervention. Therefore, this study aimed to determine the effect of plyometric (box jump) training on lower-limb muscle strength among volleyball players at KKS Bambalamotu Club. This study employed an experimental method using a one-group pretest-posttest design. The population consisted of 12 volleyball players from KKS Bambalamotu Club, all of whom were selected as research participants through a total sampling technique. Lower-limb muscle strength was measured using a vertical jump test administered before and after the intervention. The plyometric box jump training program was conducted for six weeks with a training frequency of three sessions per week. Data were analyzed using a paired-samples t-test at a significance level of 0.05. The results revealed a significant improvement in lower-limb muscle strength following the training program. The total pretest score increased from 2,318 to 2,460 in the posttest, with a mean improvement of 11.08 points. Hypothesis testing showed a calculated t-value of 79.14, which was substantially higher than the critical t-table value of 1.796. These findings indicate that the alternative hypothesis was accepted and the null hypothesis was rejected. In conclusion, plyometric box jump training significantly improves lower-limb muscle strength among volleyball players and can be recommended as an effective conditioning method to enhance volleyball performance.
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