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Likewise, you can't get a full peak contraction of the pectorals doing dumbbell presses. Rotating your wrists may allow your chest to contract a little more fully at the top, but the difference would be only slight. Meanwhile, you would probably have to use less weight, which would take away from the overall effectiveness of the exercise.

It is my belief that pro bodybuilders are on so many different drugs that they have no way of discerning what works and what doesn't.

Oh, I definitely agree, matter of fact, I don't perform dumbbell presses or flyes in my current program, only cable crossovers.

That is exactly what i was thinking. I mean when you're juiced and doing like 20 different exercises per workout how do you really know whats doing what. This guy probably does cable crossovers, flies, close grip, wide grip, incline, decline, etc. Could just have the genetics that make the inner portion look good as well..

Not all pro bodybuilders use high volume training. Also, there are "natural" bodybuilding contests. They just aren't as popular as the untested contests. Meanwhile, bodybuilders aren't the only atheletes using performance enhancing drugs.

Whether you do flys, dumbbell presses...crossovers...
It doesn't matter if you're not lean. Losing body fat is the key to showing off your hard work...the definition you're after.

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Your mind needs exercise too.