Hey guys, I was lifting back today at the gym and after I finished my second set of stiff leg dead lifts one of the trainers, who is a woman, came up to me and said my form was all wrong. She said as I was going down with it my back was arched and not straight, which would eventually cause me to slip a disk in my back and what not. I can't really help that my back arches when I bend over. What is your guys' input on this?