Nature vs. Nurture. The age old debate. In the past couple centuries, geneticists came around and proved that our DNA has a lot to do with how we end up. Here’s my theory, we need to take it back a little bit. We control a lot more about our lives than you ever thought possible.
If we control our brains, and our brains control our vision, and our body, and how fast we age. Then we we play a huge role in our own development. I think it goes much deeper than that too. Think about all the mental disorders that aren’t genetic. They don’t just fall out of the sky. We need to stop forcing the genetic model on diseases when it doesn’t fit. “Potentially recessive genetic predisposition” or “partial genetic component” should cue you in. Perhaps if they aren’t pre-programmed into your being, then they are learned. Just because we don’t know how they are learned, doesn’t mean that they aren’t.
Nurture.
I’m not saying that if you top out at 150 pounds you could be an NFL running back, but I’m not ruling it out. Don’t let science get in the way of what you want to do. We have no clue how the brain works, so don’t base your life around it.