Matrix Planks

I have already described what a plank is, and what makes it so difficult. The sick and twisted minds at the gym can't leave hard things alone. They have to tweak them and make them even harder. I don't know exactly who came up with this one, but it is the newest torture in Art of Strength class. Actually, matrix planks are pretty cool, and they showcase my natural flexibility. I am a trained professional, don't try this at home....actually, do try this, it is great exercise.