I was really sore after my first time with PUB! I found myself massaging and poking around at my biceps the next day, to try to fend off any additional soreness.
I may have found a way to reduce the soreness: yesterday, after PUB, I did Gin Miller's "Intense Moves" which is cardio focusing on legs, but which has enough arm movement to help keep things circulating. WHile I'm still a bit sore today, it's not as bad as before.
I'm planning to continue this "upper body weight/lower-body focused cardio" and "lower body weights/upper-body focused cardio" (ie: boxing) for a while and see how it works out.