I would really advise not taking science out of Arnold's book. It is entertainment just like the movie Pumping Iron in which Arnold says "if I did lower reps my muscles would take on the bulky look of a powerlifter's." I haven't read his books more than thumbing through them but he and BBing in general are not good sources for a solid grasp on this stuff.

For instance - in your recruitment take above, that's just not how it works. All fibers get recruited between 50-85% of your maximum voluntary effort. That means the very first rep of your 5RM will recruit all of your fibers. That also means during a 10 rep set, most will be recruited in the first few reps and by the time you get to rep #5 where you can only do 5 more (or your momentary 5RM which is around 85% generally) all your fibers will be recruited. Rate coding and syncronization come into play but it is not how you have it above in any way, shape or form. And this is very well known, absolutely accepted, and very well verified and documented (hence, don't take science from Arnold or most BBing related sites - they are generally horrendous and even when they do have some information behind them, they tend to erroneously extrapolate information in ways that are close to retarded i.e. the under 60 minute workout due to hormonal changes - such horrendous misapplication of information).

I would read this thread and NWlifter's posts to get a solid grasp on this: http://www.drdarden.com/readTopic.do?id=394848.

I would also say, you'd get a lot out of what I've written here: http://www.bodybuilding.net/training...rent-2972.html