Thanks, had no idea. I figured it would cause the weakness in low-back b/c I let my monkey arms do most of the work and rarely employ legs for bending. I honestly haven't attempted a real DL in over a year b/c I couldn't walk upright for a week last time I tried.
RDL's work my hamstrings most (it seems). DL's just look different on everyone, and the way I first learned them just seems all wrong to me. From the ground, up!