So I'm certain I'm not doing overhead press properly. I started starting strength recently (pretty much in line with several others in this thread...) and I'm currently on week two. To start off, I do a proper warmup before lifting. I row for about 10 minutes at various speeds as well as jump rope for about 5 minutes before starting routine. And before I do an lifts that engages the shoulders quite a bit (so bench press/military press), I warm up the rotator cuffs with little 2.5 or 5 lb plates doing various exercises. My point is... I generally take precaution before lifting. So why is that when I get to my working sets for overhead press, my left arm just gives out? It was really frustrating today. I know it's hard to say without looking at my form, but the problem occurs as I'm bringing the bar down to the chest area... that's when my left shoulder seems to give out (especially odd since I've had problems with right shoulder in past, never left). From past experience, any reason why this might be? FWIW, I don't really stick my chest out as much during press, could this be the reason?