Due to getting caught up in work yesterday morning and having to hustle off to the gym, I didn't drink my usual whey protein shake before heading off to my workout with my personal trainer. I'm only mildly sore today, so notwithstanding my previous data
on the subject, it appears that now that I'm reasonably well acclimated to strength training, the extra protein isn't critical for preventing muscle soreness. (Of course, it's always possible that I'd be even less sore if I'd consumed the whey protein. It's a problem when you use yourself as a clinical trial of one - no controls.)
Whey protein is still very handy as something that I can eat shortly before an intense workout without being in danger of it making me sick. But it's nice to know that if I miss it once in a while, it's not catastrophic.
On the downside, something that I did in my workout yesterday irritated my left hip a bit. It would be a hell of a lot easier to follow my doctor's advice of "Exercise as much as you can, but don't do anything that causes pain," if I didn't have to wait 18 hours to know that at least one of the 6-10 exercises I did was apparently a bad idea.