Based on the researcher’s observation of male students in class VII SMPN 023 Pekanbaru. Researcher discovered a weakness of volleyball under serviced. It seen when under served many balls still not over the net and the ball is not optimal, it influences phsycal fitness like arm-shoulder muscles. The purpose of this research is to see how much the correlation of arm-shoulder with ability of vo…
Based on the researcher’s observation of male students in class VII SMPN 023 Pekanbaru. Researcher discovered a weakness of volleyball under serviced. It seen when under served many balls still not over the net and the ball is not optimal, it influences phsycal fitness like arm-shoulder muscles. The purpose of this research is to see how much the correlation of arm-shoulder with ability of vo…