N. Yanti and V. G. Simanjuntak, “Estimated Cardiorespiratory Fitness in Multi-Discipline Martial Arts Athletes at the Beginning of Centralized Training: A Cross-Sectional Study”, INSPIREE JOURNAL, vol. 7, no. 03, pp. 256–266, Sep. 2026, doi: 10.53905/inspiree.v7i03.183.