Ritthitham S, Prachanban S. THE EFFECT OF INTERVAL TRANING ON CARDIORESPIRATORY ENDURANCE OF RAMKHAMHAENG UNIVERSITY DEMONSTRATION SCHOOL (ELEMENTARY LEVEL) BADMINTON ATHLETES. PRRJ(Sci&Tech) [internet]. 2021 Jul. 15 [cited 2026 Sep. 10];16(2):81-92. available from: https://li01.tci-thaijo.org/index.php/PRRJ_Scitech/article/view/251152