rahim, anita faradilla, and nur laisya mayeda. “PERBANDINGAN PENGARUH JACK-KNIFE STRETCHING DAN NORDIC HAMSTRING EXERCISE TERHADAP FLEKSIBILITAS OTOT HAMSTRING”. Jurnal Kesehatan Hesti Wira Sakti 11, no. 02 (October 30, 2023): 166–174. Accessed August 28, 2025. https://jkhws.itsk-soepraoen.ac.id/index.php/jkhws/article/view/47.