G
gavingc
Guest
There are elements of truth in the arguments of both Goosey and Gavin.
A narrow grip obviously results in further travel for the bar and a few extra degrees of rotation around the shoulder. This results in extra work and depending on technique, the pec may take on more of that work.
A wide grip puts the pec at a disadvantage through leverage and in my opinion can transfer an enormous load to the pec if the technique is adjusted to ensure that this happens.
When benching with a wide grip there is a tendancy to take advantage of the fact that the bar is solid and to push outwards. This transfers load onto the triceps and away from the pec. If you choose not to push out and actually attempt to push your hands together as you press then the pec has to take over.
+1 Slight differences in technique.
Flare the elbows = more shoulder (and injury risk).
Tuck elbows against body/waist = almost no pec.
I said slightly wider grip if pec development is wanted. Recently 3 people have suddenly developed more chest from benching with the aim of using more pec.