Hidayat T. The Effectiveness of Medicine Ball Sit Up Throw Exercise on Arm and Back Muscle Strength in Junior High School Students: Efektivitas Latihan Medicine Ball Sit Up Throw Terhadap Kekuatan Otot Lengan dan Punggung Pada Siswa Sekolah Menengah Pertama. INSPIREE JOURNAL [Internet]. 2021 Sep. 27 [cited 2025 Aug. 14];2(3):204-13. Available from: https://inspire.igiinsight.com/index.php/inspiree/article/view/45