Conrad had a bad car accident over a decade ago. I think he required an assistant from then on.
He had a regular podcast, or something like that, that I caught a couple times(like 10 years ago/after accident). I got the idea he was grumpy in real life or that was kind of his schtick.
Side note: I don't even think he lifted much or at all when he was younger. He was very athletic, did situps, pushups, bodyweight pullups, etc....