Category standards for leg power in high school volleyball players

Abstract

Leg power is an important biomechanical component in volleyball because it supports jumping ability during spikes, blocks, and explosive movements on the court. However, the mapping of leg muscle power categories among high school volleyball players remains limited, particularly in the context of school extracurricular training. This study aims to analyze and establish category standards for leg power in high school volleyball players. The study employed a quantitative descriptive design involving 20 students from the volleyball extracurricular program at MA Wathoniyah Islamiyah Kebumen, selected from a population of 29 students. The research instrument used the Vertical Jump Test, administered three times, with the highest jump result recorded. Data were analyzed using descriptive statistics through the classification of leg muscle power category norms. The results showed that the majority of players fell into the average category (12 students, 60%), followed by the below-average category (4 students, 20%), the above-average category (3 students, 15%), and the poor category (1 student, 5%); no students were classified as excellent, very good, or very poor. The study’s findings indicate that high school volleyball players’ leg power is still at a moderate level, suggesting a need for more specific and structured training. This study contributes to establishing a framework for categorizing leg power as a benchmark for evaluating the physical conditioning of high school volleyball players.