 They grew taller. Their bodies changed. They were much more defined. Their muscles were, they were more explosive off the blocks. They were quicker off the turns. And suddenly I couldn't keep up with them anymore. I couldn't keep up with them in practice. I couldn't beat them in a race. Ooh, and there's nothing that made me more mad than that. But that was the reality of it. So yeah, puberty certainly is a game changer and it's irreversible.