2025. The Level of Flexibility of the Elderly in the Healthy Heart Gymnastics Community at the Sidoarjo Youth, Sports and Tourism Office. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga. 17, 2 (Aug. 2025), 2073–2079. DOI:https://doi.org/10.26858/cjpko.v17i2.294.