Who rhymed precocious and pro blush?

I went to a new gym just for today for a change of pace. I got my butt whooped by a StairMaster, which is pretty standard. Less standard was the moment I realized that I was exercising feet away from this person. At first I thought that time hadn't been too good to her, but changed my mind later when I learned that she is sixty-one years old. That doesn't seem right, but it is.