LoneTree said:
Biceps only take 48 hrs to recover (Arnold's book).
I'm sorry man but that is just not research or science. Arnold may have been a great BBer but it's certainly not because he understands even the basics of exercise science. Look up studies on complete tissue remodeling with regard to weight training. Just logically there are going to be parameters that can drastically pull this single session figure to either side including:
-The conditioning of the athlete (to what training loads has this athlete accustomed himself)
-The level of fatigue present (you'll need to understand dual factor or fitness fatigue theory which is absolutely key for periodization)
-The amount of work performed (volume i.e. 3 sets of 8 or 100 sets of 8)
-The intensity with which the work is performed (i.e. are all these sets being done with 90%+ of your 1RM or are we talking 10% featherweight sets).
If you are inclined to really learn beyond the bogus stuff presented in the BBing mags, the ignorance of which never ceases to amaze me and really harms the results of so many people in the gyms, you can check out any of these books which are widely regarded as some of the finest ever written on the subject:
www.elitefts.com - Go to the books on training. You'll find the following (in no particular order):
A System of Multi Year Training in Weightlifting
Fundmentals of Special Strength Training in Sport
Supertraining (plus lots of others by Siff)
Managing the Training of Weightlifters
Science and Practice of Strength Training