I've seen LOTS of trainers like this, but at the gym I'm currently at two of the only trainers there are youngish females. One is kind of chubby, not to athletic looking at all, and the other is fairly tall and thin. I wouldn't peg either one as a personal trainer (or a gym goer at that) based off their looks. I will give credit where credit is due because these two do a great job with the elderly clients (90% of the clientele it seems) and also people with basically ZERO activity for a few decades.