Nataloka, S. W., S. Sulaiman, and S. Rahayu. “The Impacts of Body Sculpting Exercise and Age on Body Fat and Waist Circumference”. Journal of Physical Education and Sports, Vol. 8, no. 4, July 2019, pp. 76-81, https://journal.unnes.ac.id/sju/jpes/article/view/32011.