Do girls in their early 20s all get fatter, and then either stay fat or get fit?

Anonymous
It seems like most girls who are teenagers are in pretty good shape. Youth, not working out I imagine.

And then it seems that most girls get bigger in their early 20s. This probably happens because of metabolism slowing down, or because they start drinking beer?

Could be a number of things.

But then women almost 30, or early 30s are either really good looking, or really big. I almost want to say that a significant number, over 60% are either really fit, or really big. So the "average" size which should cover at least 70% is not so common.

So, are these fit women always fit? Or do women all get big for various reasons in their early mid 20s, and only some come out with sexy bodies?
Do girls in their early 20s all get fatter, and then either stay fat or get fit?
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