I did my chest today and got on the flat to start out. I was warming up and noticing that my back is almost impossible to keep evenly on the bench. I was sliding a bit to one side or the other stressing that particular shoulder and making me feel a tad off balance.
Tried a few diff things to avoid this..made sure my back was exactly centered, my hands were at the same point on each side. yet as soon as i lifted off i'd slide a little bit to the left or right.
I was wondering if im using one side more than the other to lift off causing my back to move over to that side a bit? Would having a lift off help this?