Which is more difficult, plank on forearms or plank on hands?
They are both equally as difficult, however, it is more of a personal preference I think. To kick it up a notch I suggest doing what I call Plank Up & Downs. Begin in the plank position, raise your body upwards with your left arm, then your right, then left arm down, and followed by the right arm. Start with your left arm, then at 30 seconds switch to the right. Get ready to sweat! And pant lol 🙂