Blue collar or white collar is less important than fat or skinny.
I wrote a poem:
Fat surfcaster and skinny surfcaster to a spot did race
Fat surfcaster fell off the rock and broke his hip, knee and face
Skinny surfcaster stayed and fished in his place
I am somewhere in between Blue/White. I do constructions sales. Somedays I am at a desk all day, somedays I am in the field in boots and hardhat getting dirty. More desk work lately though.
I think it comes down to passion and love of the sport more-so than your job.
I go to the gym 4 days a week, so no matter what I am doing, I am in reasonable shape. Although the winter beer bulge does seem to last further into the spring each year.
White collar but have a 15 acre farm so I am always cutting wood, brush, building stone walls, etc. I lasted 40 years in the surf average 100+ nights a year. Still had the stamina till I got cancer then the chemo kicked my butt so I got a boat. I went into remission this Fall so I was back in the surf up to Dec.
I don't think the job as anything to do with it. It's the passion the guy has for the sport that determines how long he lasts....