An Inconvenient Cat

I'm trying to do the (painful, since my quads are full of lactic acid) wall squats and every time I am in the "sitting" position, Martin comes over and meows at me. When the 10 second interval is over, I stand up to pet him, he runs away. I think it's because the sitting position looks like it has a lap -- always a cat-friendly position, right? Err... no, Martin.