E. Awad, A. Mobark, A. A. Zidan, H. A. Hamada, and T. Shousha, “Effect of progressive prone plank exercise program on diastasis of rectus abdominis muscle in postpartum women: A randomized controlled trial”, J. Hum. Sport Exerc., vol. 16, no. 2proc, pp. S395-S403, Mar. 2021.