Relationship between arm length, arm muscle strength and eye-hand coordination on the results of the upper service in the Garuda Jaya Sumatra volleyball team

Background: This study aims to determine the relationship between arm length, muscle strength, and eye-hand coordination with overhead service skills of male volleyball players of Garuda Jaya Sumatra. Objective: This study aims to identify the relationship between arm length, arm muscle strength, and eye-hand coordination to the results of overhead serves in Garuda Jaya Sumatra volleyball players Method: This study uses a quantitative descriptive research type with a correlational research method. This study took a sample of 14 male volleyball players aged 14-17 years who play at the Garuda Jaya Sumatra club. The method used is total sampling of male players aged 14-17 years. The instruments used to collect data are: Anthropometric Test to measure arm span. The arm muscle strength instrument uses the Camry-Electronic Hand-grip Dynamometer model EH101 ISO 9000 Certified by SGS (Societe Generale de Surveillance) with kilogram (Kg) units. Tennis Ball Throw-Catch Test to determine eye-hand coordination. Volleyball Overhead Service Test to assess overhead service skills. Data were analyzed through multiple regression and correlation tests with the help of SPSS version 27. Research Results: The results of the study showed that there was a significant relationship between arm length, arm muscle strength, and eye-hand coordination on the results of the upper serve, as seen from the sig value of 0.02 <0.05. The results of this study can be implemented by volleyball coaches on athletes to identify Overhead serve skills. So that it can provide solutions in terms of improving athletes' upper serve skills.