Pengaruh Latihan Naik Turun Bangku Terhadap Kekuatan Otot Tungkai Siswa Putra…

Abstract: based on observations done in the new country junior high school, researchers found some questions about the volleyball's operating muscle strength while blocking, and on spike. Between players can't do a spike because of the lack of height jumps, which is caused by the strength of the student's legs. The purpose of this study is to know the effect that exercises have on the limbs…