I really wonder how much muscle composition has to do with genetics and diet as well -- I think a lot more than most people realize. I have one child who is very muscular. Crazy muscular. As in washboard abs since she was 3. When she moves, you can see every muscle expand and contract. Every part of her is just tight and muscular -- and she's 8. And she is certainly does not weight lift. And she is no more active than any of my kids.

I sometimes wonder if we set ourselves up to be discouraged when we try to have a body shape that just isn't naturally how our bodies want to be.