LOUIE, Lobo, and Hou Wai YUEN. “Physical Activity Level Among Hong Kong Secondary School Students During Physical Education Lessons and Extra-Curricular Activities: A Descriptive Study: 初步探索香港中學生於體育課及課外活動的身體活動量”. Asian Journal of Physical Education & Recreation 8, no. 2 (December 1, 2002): 38–42. Accessed May 4, 2024. https://ejournals.lib.hkbu.edu.hk/index.php/ajper/article/view/1268.