im curious to the type of bench you use, a low back or high back? I have to do shoulder press with dumbells on a high back with a slight incline my back arches so bad. I bring the bench as close to the db rack as I can and put my feet on the dumbells so I force my lower back to stay on the bench.. 140's.. sheesh.. I can row the 140's, aint sniffin em on shoulder press though