I feel like my lack of flexibility stops me from doing these. As I try to bring my elbows and arms straight back, my hands move forward of my body. Am I missing something here?
If you pull your elbow straight back you should be able to feel a groove in the back of your shoulder which is where the bar should sit.
I didn't like the rules you gave me, so I made some of my own.
Strong people are harder to kill than weak people, and more useful in general. - Mark Rippetoe