It is true to a point.
Bob and Coleman are good examples it's not the case across the board, but if you're destined (cursed) to go bald by your genes the extra testosterone produced in relation to training will speed up the process and you'll end up a slaphead before you would have if you'd been a non-trainer.
The real proof for me will be my brother who's 7 years my junior and doesn't lift. If he doesn't start going bald in a couple of years time then i'll definitely say training contributed to mine.
But heck i'd still rather be in better shape and bald than hirsute and fat or skin and bone.
