Originally Posted by
Cataphract
By common convention it is the other way round. It is laid out neatly in the book "Body by Science" which I can only recommend to everyone. They do something like 45-60 seconds under load until complete muscle failure once a week (or something like that, will look it up) for the big muscle groups. Thus every fiber group will be evenly stressed for hypertrophy in minimal time.
I don't think that's entirely true, also from my own experience. Many if not most body builders do a lot of reps. There's the sarcoplasmic hypertrophy theory.
I've just added some endurance elements in my upper body training and it feels good and it seems to help in other areas as well. I don't know, but I just call it warmup.