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 Nov. 9];2(3):204-13. Available from: https://inspiree.review/index.php/inspiree/article/view/45