Oh forgot to mention one other thing.
If you have a layer of fat around your waist (little gut as you put it) this is due to Cortisol, not Estrogen.
Why do you think your spare tyre is the hardest thing to loose when dieting?
Dieting and training hard increases cortisol levels which in turn makes your body hold on to fat around your waist.
Another reason why it is almost impossible for Natural bodybuilders to get ripped and be really big at the same time.
Why do you think Top bodybuilders use Aminogluthamide? Not only is it an anti-estrogen, but it is also an anti-cortisol drug.
Andreas Munzer was alledged to be using this drug at up to 2 grams per day!!!!! The recomended dose is 250 - 500 mg's per day. Now do you see why he was one of the most ripped bodybuilders ever.
However this drug was one of the things that was implicated in his death.
Now do you see why these guys can diet loose that spare tyre and end up with wash board abdominals.
Genetics, diet and hard training.........Bollocks.
More like the correct combination of drugs.
They train the same as any of the rest of us, ok they use heavier weights, but this is due to the use of powerful androgens etc.
I'll let you in on another little secret:
Most pro bodybuilders hate cardio and I know some who don't even bother doing any while getting ready for a contest. I've heard of others that only do 20 - 30 mins 2 - 3 times per week and this is while they are getting ready for a contest.
Don't believe all that bullshit in the magazines saying they do 1-2 hours twice per day, it is complete and utter lies.
Go figure.