It is been said everywhere that any strength/muscle gain workout should be restricted to 45 minutes, due to hormone levels decay after that time. Many say that you are even supposed to cause loss of muscle mass if you keep on training beyond that time limit.
I try my best, but my workouts (very similar to StrongLifts/Starting Strength) take 60~70 minutes minimum. I end nearly exhausted and trembling (which is OK, I don't have any problem with that).
But, should I cut the number of sets, or? I want to gain strength and muscle mass. Is it really important to restrict the workout to 45 min? When you have a look at the workouts that are supposed to be followed by high-level bodybuilders, it is clearly impossible that they do that in 45 minutes.