Kim, Jin-Seop, Jong-Seon Oh, and Seong-Gil Kim. “The Correlation Analysis Between the Estimation of VO₂max Using the Harvard Step Test, Queens’ College Step Test, 90-90 Queens’ College Step Test, and the Measured VO₂max Value from Cardiopulmonary Exercise Testing (CPX)”. Journal for ReAttach Therapy and Developmental Diversities 6, no. 10s(2) (December 23, 2023): 1617–1621. Accessed May 20, 2024. https://jrtdd.com/index.php/journal/article/view/2004.