Soreness and form questions

vashnic

So this is my second session of trying to lift things and first real 5x5 attempt! No matter how much I try, it's very hard for me not to have slightly hunched shoulders during the deadlifts (70 lbs.) and goblet squats (50 lbs.) My lower back seems just slightly arched all the way through and feels fine, but I am quite sore between my shoulder blades--is this a normal area to hurt after?

Are there specific upper back exercises I should be doing to strengthen it up before trying more?

Also, so far I have been lifting and lowering the weights fairly slowly to watch myself in the mirrors, but lots of youtube guru lifters and many guys at the gym seem to sort of jerk the weights up and then let them bang down on the floor. It's pretty much a string of -grunt-BANG-grunt-BANG-etc.

Should I be speeding up lifting to match theirs? It seems a little...unsafe? Or at least hard on the floors. XD

tameko2

1) no need to do the heave and grunt - that mostly comes from lifting too heavy (I mean, its fine for something like a competition or a 1rm where you really are trying to lift the absolute heaviest you can, but for work sets its not a good ideA)

2) shoulders....hrm. Really hard to offer suggestions without seeing it, but I'm thinking maybe you just need to do the shoulder/doorway stretches? And also - it may not be as hunched as you think, its probably (?) fine. But yeah, hard to say without seeing you.