Kontribusi Kelentukan Otot Punggung Dan Daya Ledak Otot Tungkai Terhadap Hasi…

Abstract: The purpose of this study was to determine whether there is a relationship between back muscle flexibility and leg muscle explosive power on the results of headings on male extracurricular students of SMK Negeri 7 Pekanbaru. The place of this research was conducted in the field of SMK Negeri 7 Pekanbaru on Jln. Yossudarso Rumbai was conducted from November 2019 to April 2020. The …