I've noticed at least two subgroups of gym girls, excluding the fatter girls trying to lose weight. You have the fitness chicks, who are more about being slim and looking good. Then there are the athletic/competitive girls who are more likely to get obsessed with Crossfit or do powerlifting. They can get a little beefy and act slightly masculine at times. With some of them you may be unsure if they are secretly lesbian. There is a tendency towards butterfaces. I think Gio is talking more about the first group. The second group is a bit weird. You would think they would be all about health, but then when you talk to them you find out that they also smoke weed, eat Doritos, or party on the weekends. They have sort of a work hard/play hard mentality.
If only you knew how bad things really are.