Very hard to say for sure who does what. Pure speculation for most part.
The trouble is, if we all knew exactly what they guys do, then there are always gonna be some idiots who are going to try to copy exactly what they do and how they do it in a bid to look like them..etc.
A few pro's have spoken up about the drug abuse in the sport.
I was just reading some posts by Shawn Ray over at the MD forums the other day. I've always been a fan of Shawn's despite the fact he likes the sound of his own voice sometimes.
Anyway, he didn't actually say anything about who does what but basiclly stated that one of the reasons he retired was due to the increasing drug abuse in the sport and he didn't want to jeapordize his health to keep up with them.
Realisticlly, at 5ft 7 and 210 - 215lbs...he knew he didn't really stand a chance against the likes of the bigger guys, despite the fact that IMO he had a better physique than 90% of them!
The IFBB have a lot to blame for this because over the last 10 years, bodybuilding has basiclly been dominated by mass and sheer size. So the bigger you are, the better you are in their eyes.
Of course some of these guys have gone to extremes to keep up with the criteria and have put their health a risk to do so.
Personally, I think bodybuilding today is a joke. It's nothing more than a freak show....of course that's just my opinion so I hope none of you guys take offence to that.
However, they are gradually starting to move away from that trend which to me is a very positive step.
I believe most of the big guys do go to extremes to get to where they are in terms of drug usage. But let's not forget they all work very hard aswell...so it's not all about drugs.
For most of them, their body is their job and if they don't keep up with the criteria the IFBB set and continue to keep their placings high...they don't get paid. So then they have 2 choices: quit or try to keep up
As far as I know Jay Cutler started taking A-bombs when he was 19 years old (first cycle) and has been in the game since then!