Hakim, Ratih Dwiratna, Lanny Indriastuti, and Erna Setiawati. 2025. “Effectiveness of Adding Expiratory Muscle Strengthening Exercise to ‘Senam Lansia’ on Cardiorespiratory Fitness of Pre-Frail Elderly”. Journal Of The Indonesian Medical Association 75 (2), 95 - 100. https://doi.org/10.47830/jinma-vol.75.2-2025-1445.