Abstract
Service is the first step in starting a volleyball game, so elements that can support service are needed. In addition to regular training, the elements of arm muscle strength and abdominal muscle strength are the capital to be able to do service in volleyball games. The problem in this study is whether there is a relationship between the strength of the arm muscles and abdominal muscles with the ability to serve on the volleyball game for the students of SD Negeri Pogar Bangil. The population of this study were all students of SD Negeri Pogar Bangil. The sample of this research is the fifthgrade students of SD Negeri Pogar Bangil.This study uses a quantitative approach with the type of correlation research (relationship). The data are push-up test data for arm muscle strength and sit-up test for abdominal muscle strength. The data analysis technique used in this research is to use the product moment correlation formula from Karl Pearson and the contribution of the predictor. The results showed that r xy = 0.972 for the arm muscle strength variable, and r xy = 0.892 for the abdominal muscle strength variable. There is a significant relationship between the strength of the arm and abdominal muscles with the ability to serve on volleyball for the students of SD Negeri Pogar Bangil. The calculation of the predictor contribution shows that the total contribution is 95.900, namely the contribution of the arm muscle strength variable at 71.347 and the abdominal muscle strength variable at 24.553, so that the arm muscle strength variable has a greater relationship than the abdominal muscle strength variable to the top service ability in volleyball games.
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