OK, Me and G-reg are fighting every night in the gym about form...Would someone like to settle this for us.. On the nights we work shoulders/back, When we get to dumbells and the smith machine or straight bar doing military presses, sitting and standing...Should you take the dumbells down until the are even with your shoulders or only bring them down 3/4 way until your bicep is parallel with the floor? On the smith machine or straight bar, If you are doing presses behind the neck...Should you let the bar touch the back of your traps while you're pressing or only go 3/4 way down till your arms are parallel with the bar/floor????