AJJIMAPORN, A., K. CHAIJENKIJ, and R. CHAUNCHAIYAKUL. “EFFECTS OF EXERCISING POSTURE ON HEART RATE AND ENERGY EXPENDITURE IN PREGNANT THAI WOMEN”. Journal of Sports Science and Technology, vol. 14, no. 1, Aug. 2014, pp. 145-54, https://he01.tci-thaijo.org/index.php/JSST/article/view/44098.