Fudin, M. S.; Fikri, M. F. H. I.; Febrianto, N.; Sulendro, S. The Effect of Interval Training on Cardiovascular Endurance and Agility of Students in Futsal Extracurricular SMK Negeri 1 Trenggalek. Ina. Indones. J. Sport. Heal. Phys. Educ. Sci. 2025, 3, 122-128.