Hellow Mark,
I am doing starting strength now, but I can't hold my back stright all over the lift. In the warm-up sets I succeed to do it, and to do a regular deadlift, but in the work-set I do a straight leg deadlift, and not hold stright my back.
Here is a work set with 159 lbs.
http://youtube.com/watch?v=H6lvjW_nHfE
What do you think? how can I improve my form?
thanks!