Pangkahila, E. A., Adiputra, N., Pangkahila, W. and Yasa, I. W. P. S. (2016) “Balanced Physical Exercise Increase Physical Fitness, Optimize Endorphin Levels, and Decrease Malondialdehyde Levels”, Bali Medical Journal, 5(3), pp. 493–496. doi: 10.15562/bmj.v5i3.337.