Utami, Arini, et al. “COMPARISON OF THE EFFECTS OF CORE EXERCISE AND BALANCE STRATEGY EXERCISE ON WALKING SPEED AND FRAILTY LEVEL IN THE ELDERLY”. PREPOTIF : JURNAL KESEHATAN MASYARAKAT, vol. 9, no. 1, Apr. 2025, pp. 986-95, doi:10.31004/prepotif.v9i1.38507.