I had to ease off some as my old shoulder injury (from a mountain bike fall) started bothering me again. I spoke to my Pilates instructor about it, and she thinks it's my rotator cuff. Here I thought the rotator cuff was on the back of the shoulder! She told me to cut back on pups and when I do them, not to go down as far. So, I'm just doing 20 full pups a few times a week, and I'm good with that for now. I may never make it to 100, but I've gotten way stronger than when I started and could barely eke out 9, and my arms look much better too!