I've never done 1 rep max before. I've always done 3 sets of 5 for my squat, and 1 set of 5 for my deadlift. Right now, I do 3 x 5 @ 285 lbs for squats, and 1 x 5 @ 350 lbs for deadlifts. According to 1 rep max calculators, my 1 rep max in the squat is 321 lbs and my 1 rep max in the deadlift is 394 lbs. I don't know how accurate this is. I want to test my squat and deadlift 1 rep max. (I'm not going to bother with bench because I suck at bench, I can only do 70 lb dumbbells for 3 x 5, and I've never actually done barbell bench before). I also want to test my overhead press 1 rep max and my power clean 1 rep max, but I care more about the squat and deadlift now. How should I do this? Should I warm up the same way I do for 3 x 5 and 1 x 5? Should I do them both on the same day? What order should I do them in?