Agree with Zeus to...reverse grip seated rows do work the lower's very hard..but I would have to say rack deadlifts are best overall thickness movement...I love deads...I would do a combo deal of starting out with lighter warm ups for 10 reps (example 135 x 10, 225 x 10) then moving up to heavier weights using less reps, but still warm ups (315 x 5, 405 x 5, ect) then move on to the working sets ... for about 6-8 reps...(495 x 6-8, 585 x 4-6) then finish with a high rep set (405 x 14 + 4 + 2 / rest pause set for 20 reps) ...