The world famous spine expert puts the whole spinal flexion, rounding-the-back issue to rest, along with describing the proper way to train core rotation and much more.
In Part One of my "no curls" arm specialization training series, I talked about the absurdity of most arm specialization routines. I proposed that most trainees do more than enough biceps curls and triceps press downs and don't really need more of either of them.