I mean, "middle school track runner" and "high school track runner" could be very different things. But if we're thinking she must be a skinny-minnie because she's a track runner, then, yeah, that goes hand in hand with having more muscle. If she's just the fastest kid in her gym class of video game addicts, then it's all moot anyway
But at the root of it, I come from a family of tall skinny women ... and a tall woman can weigh 150lb and still be plenty skinny.
LOL - that could be!
In spite of all my speculation about height, weight, etc. I haven't lost sight of the tragedy of this poor girl's situation. While the extreme weight loss is a tragedy in itself, it's obviously just a side effect of a very bad home life. I had a friend in high school who was being raised by her mentally retarded mother and elderly grandmother. It was a very tough childhood for her, and she didn't come out of it very well. It was a difficult life for all three of them. I pray this situation turns out better.