I thinks its a combination of the two. You don't look like that without hard work, but by the same stretch, you can't look like that unless you've got the right genetics.
Personally, I wouldn't want to be that big. No disrespect to him. I think he must be very dedicated and have worked his áss off to get to that size, same as most pro bb's, and I have the utmost respect for that, but it doesn't really appeal to me (or any women I know
)
Genetics and muscle form? 
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