[quote]Professor X wrote:
They may have trouble activating that muscle group. Some people are shoulder dominant with any upper chest movement. Unlike the previous poster, I would not blame that on steroids.
For the most part all bench pressing is done by the shoulders with help from the chest. the only way to really get it mostly out of the picture and make the chest do most of the work anatomically is dumbbell presses where you maintain a neutral grip throughout the motion (all four bells touch together at top) Obviously complete isolation is impossible
That’s a good example of broscience.
The pectorial major muscle is agonistically involved in pronation, therefore, the four dumbells should not touch eacht other, at least in theory.
For all practical purposes, the dumbell position directly above the chest will provide very little stumulation, because of mechanical reasons.
So the actual db ending position of a rep with that exercise is just not very meaningful and nothing to lose sleep over.
Think of the ending position of a slow barbell curl. Little to no biceps activation.