Yup, diet can be an issue but I'm pretty on top of diet. I am getting old, and the gym tricks I do are substantial enough that people stare.

One thing I point out about athletic success vs. failure (really non-effort would be more accurate) is that some people say they would be athletic "if it weren't for the asthma, bone spur, back problems..." whereas every athlete I know overcomes injuries, deals and lives with breathing problems...etc. I don't know any natural athletes who are not compensating for something.