Pengaruh Latihan Peregangan Statis Terhadap Kelentukan Otot Punggung Pada Pem…

The problem in this research is that the athlete's body position when doing the smash only makes jumps, in a stiff body position the knees are not bent so that the body movements are not harmonious. especially after assessing and warning whether there is an increase in muscle circumference. The format of this research is (using a one-group pre-post-test design approach) with the PB Angkasa Pres…