I don't think limits.
If Queen Elizabeth knighthooded me and I would get the title Sir Usain Bolt. That sounds very nice.
I don't put myself under pressure.
For me, I'm focused on what I want to do. I know what I need to do to be a champion, so I'm working on it.
I try to focus and compete and do positive things for the sport.
I can still improve a lot, but there is definitely a limit to what the human body can do.