Development of a Digital-Based Tool to Measure Volleyball Players’ Upper Limb Muscle Explosive Power

Abstract

It is evident that manual tools used to assess volleyball players’ upper limb muscles show some shortcomings in terms of time consumption, accuracy, and high concentration that forecast errors occur during measurement. To address such an issue, this Research and Development (R&D) aims to design and develop an effective digital-based instrument for measuring arm muscles’ explosive strength. The participants of this study were 52 male students that were divided into a small group (n=12) and a large group (n=40). They are sports science students at Pahlawan Tuanku Tambusai University. There were also nine experts involved in this study. These experts are from some disciplines, namely volleyball, Information Technology (IT) media, as well as test and measurement. Data were collected by means of questionnaires adopting a 4-point Likert scale. After data analysis, results show that all nine-instrument development validators who are volleyball experts, IT media experts, as well as test and measurement experts confirmed that the product developed is Very Feasible (91.58%). Moreover, the reliability test conducted using the product-moment correlation obtained r of 0.652, while the results of the effectiveness test performed using the Independent Sample t-test was 1.000>0.05. The developed tool that functions as a digital-based tool for measuring volleyball players’ upper limb muscle explosive power is considered Very Feasible by the experts. Thus, it can become a useful tool for mitigating errors and enhancing accuracy to measure arm muscle explosive power in various settings and purposes.