hey thanks! He picks up on some worthwhile stuff periodically, I suppose.
as for the lower back issue
1) Ghetto GHR won't touch your lower back in the least. You'll be too worried about your hamstrings yelping
2) You build up to it. As I said, this is the MOST advanced, as far as workload, program I have run. It is exhausting. You don't just jump into this. your workload capacity should be VERY high from a DF 5x5 or from a whole helluva lot of training
3) Reverse hypers are as much for recovery on some days. Remember, accessory work doesn't ALWAYS have to be balls-to-the-wall. It can be a "feeder" workout. Also recognize that reverse hypers STRETCH the lower back out, which you will find feel GRRRREAT after deadlifts and GMs and the like
EDIT - realized I didn't mention pullthroughs. Those are a fine substitute for reverse hypers if need be.