every time I lift chest my shoulders become too active.. I asked a local bodybuilder to help me with my form a year ago and, after several sessions, we got it to be pretty damn good, so I can't blame my shoulder involvement on poor form anymore.
but, no chest exercise seems to isolate my chest more than the pec deck (hear me out) -- I have one at home and have raised the seat about 8-9 inches higher than normal, extended the arms downwards so my arms less than 90 degrees from my body (I would guess 60), and have a thick pad behind the center of my back to keep a strong arch through the movement (like I have when I bench press).. I realize that all pressing exercises involve the shoulders to various degrees, but every other exercise (flat, incline, heavy flyes, and even decline) hammers my shoulders.
anyways, the question is: why do so many people think the pec deck is worthless when I feel it focus on my chest more than any other movement? I always hear that it involves the shoulders way too much, but for me it's the only exercise that doesn't.. kind of a loose question -- so maybe opinions would be just as valuable.