Oh shit, I've just read this.
I guess I've never learned how to build enough tension in my hamstrings because I would squat down and securing my grip during the set up. So, maybe most of my DLs were performed with more of my lower back instead of the posterior chain.
I've just learned how to build tension from Mark Bell's video @0:11.
Wait, is this the Russian chick with family mob connections who also has a nice ass?!