I agree. I was looking at these and thinking... "um there are girls who are actually fit". Wouldn't go as far as calling all of these characters plus sized, but they're bodies aren't representative necessarily of what activities they are constantly doing.
Lara Croft is the female equivalent of Indiana Jones, and he definitely doesn't have a gut till, like the fourth movie. They are extremely fit.
So are a bunch of other characters pictured here. Assassins, martial artists, etc. You generally have to be fit to be competent tat these things, and being competent at these things makes you fit.
It would seem we agree my fine fellow. ObiWan and Shinobi were both fit as well ;)