Well, as far as a new twist, and "what works," I've noticed a few things over the past year. I've re-habbed a shoulder with rotator cuff surgery, and now I'm re-habbing ligament reconstruction surgery on the wrist on the other side. This has forced me to do upper body resistance one-handed because of the uneven strength.
What I've found is, before the surgeries doing two-handed stuff, I was plateaued out. After doing everything one-handed, I've been able to increase the weight by around 20%, and I'm still improving. I think there's a definite benefit to doing weight training one-handed or one-legged. And that's aside from the fact that it forces your core muscles to stabilize from the tortion your body undergoes.
