Wattanaviroj, Apisa, Somporn Songtrakoon, and Sureeporn Anusasananan. “The Relationship of Maximal Oxygen Consumption Measures by Astrand-R Vhming Test and Step Test at Different Step Box Heights”. Academic Journal of Thailand National Sports University 7, no. 2 (March 2, 2022): 171–180. Accessed May 19, 2024. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/256468.