By the look of the fo and the workouts he used to do I think a normal person going to the gym doing an hour on the cardio machines is not going to be an issue. It's the muscle burning body building stuff for hours going from stupid weights down to struggling to lift a bag of sugar at the end of it that will do it.
. From the look of him after one of those workouts he wasn't fit to fly anyway his coordination was shot to hell and he had the strength of a stick of celery and struggled walking in a straight line. He did those strong man competitions lifting boulders flipping tyres etc.