It usually comes down to your own base of knowledge, vs someone else’s. You could be a lot more knowledgable than some trainer, or maybe you could totally know what you’re doing, but want some new ideas that you wouldn’t normally think of.
When it comes to the actual physical training, especially when you talk about most pro BBers, the concensus I get (and I’m sure some folks will pounce on this), is that they are not the master trainers most newbies would assume them to be.
Yes, they work hard, yes they have the best genetics, and yes they are on tons (well, some) of drugs… but compare that road to someone who had to outsmart his genetics, or who took 10 years to acheive what a more naturally gifted individual achieved in 2. I’m sure there’s a lot more you could learn from that person. (I’m not saying all the big guys know nothing! So don’t start! -lol)
Still, I think when you hear most pros, or competitors in general, talk about their trainers, it’s like Gerdy said, it takes them out of the planning part of the equation, and they essentially put the decision making in someone else’s hands.
Or, it can simply be a nuritionist, who helps with ‘contest prep’ (seems to be a big business these days). Most folks love training, but don’t seem to understand the issues involved in losing bodyfat and maintaining muscle (not to mention the manipulation of carbs and water towards the end) specifically for a show. This is when someone else can be helpful.
Personally, the few BBers I’ve looked up to in the past, as well as the few natty guys I chat with, have all done their own research, and not relied on ‘trainers’, aside from their training partners, or buddies for objective views on how they’re dialing their conditioning in.
My own training partner will constantly inform me that he’s not a cheerleader, and when I’m dragging my ass, and ‘normal’ folks in the gym are saying I look great, he’ll point out that my obliques look fat, and I’ll never be ready on time for my show… then I go and do some INterval work on the eliptical instead of going home -lol.