Hubungan Kekuatan Otot Tungkai Dengan Hasil Lompat Jauh Gaya Jongkok Pada Sis…

The form of this research is correlational research with a population of the students at SMP Negeri 15 Pekanbaru which consists of 30 students. The data in this research is the total sampling techniques. The sample in the study is the whole of the population, so the sample is 30 students. Instrument that was in this research is the power leg muscles with leg dynamometer test and the result of …