In this video, Alan Thrall explains a HUGE deadlift mistake mistake that could be causing you back pain and/or hindering your deadlift potential. He also explains how to correctly perform a Romanian Deadlift (RDL)
The Romanian deadlift strengthens the back arch along with the glutes and hamstrings, but places somewhat less emphasis on the hamstrings because the knees remain bent throughout. Because of this bend, it can also be used as a way to reinforce the knee movement under the bar as occurs in the snatch and clean pulls. It also strengthens the lats and shoulders because of the effort to keep the bar close to the legs with the shoulders in front of the bar.