Saputra, Adhe, and Ahmad Muzaffar. “Effects of Lower Limb Exercises Using a Chair on Sleep Quality, Fitness, and Risk of Falls in the Elderly”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 8, no. 1 (April 30, 2022): 1-12. Accessed April 27, 2024. https://ojs.unpkediri.ac.id/index.php/pjk/article/view/17668.