There are so many people that I've seen that do not have good form in the weight room. I've noticed guys benching who are practically doing declines. They arch their back so far I'm suprised that it doesn't break. Some people overlook it, but proper form is very important when lifting weights. Not only are you NOT getting a completely successful workout, bad form can, and eventually will, lead to injuries. If you do not know proper form, I suggest you do a little research before you regret it.