Baharuddin, Mohd Yusof, Malaarvily Shanmugam, and Hoo Boon Choo. 2017. “Biomechanics Analysis on Muscle Activation During Jumping Jack Exercise”. Jurnal Sains Sukan & Pendidikan Jasmani 6 (2): 28-35. https://doi.org/10.37134/jsspj.vol6.2.3.2017.