I thought the whole theory behind the DC method was that my lowering the volume, you dont fatigue your CNS as much. From what i read, it seemed that the reason people need to rest so long from crazy volume is because the CNS recouperates slower than the muscles.... So it seems that DC was more about muscle work, and less about CNS work.
Sort of. CNS fatigue is a function of both volume and the weight lifted relative to maximum. What I mean by that is more volume definitely causes more CNS fatigue. But it's also related to perceived effort, or "intensity." Say you are lifting your 5RM. Now say for some weird reason you want 6 reps (I see a lot of guys do this). You pump out 5, and on the 6th, you're stuck there, the bar's not moving, and you need your spotter to help you up. Now you will be fatigued simply due to the fact that you trained to failure. That single extra rep you had to eke out will cost an addition day+ of recovery. So in that sense, three sets of 5 all at subfailure could cause less fatigue than one rest-pause set of 10 performed on the brink of failure.
assume you mean gaining size in a particular fiber.... because you dont actually gain or lose fibers types... Like you can't actually gain Type II fibers, you can only increase their size.
I was of the same opinion, but then I ran across this study. I posted the full abstract in the DC sticky, so I'll just recap the pertinent part.
Eur J Appl Physiol 2001 Sep;85(5):466-71
Adaptation to chronic eccentric exercise in humans: the influence of contraction velocity.
Paddon-Jones D, Leveritt M, Lonergan A, Abernethy P.
The percentage of type I fibres in the FAST group decreased from [53.8 (6.6)% to 39.1 (4.4)%] while type IIb fibre percentage increased from [5.8 (1.9)% to 12.9 (3.3)%; P < 0.05]. In contrast, the SLOW group did not experience significant changes in muscle fibre type or muscle torque.
Basically, just to recap, two groups: fast eccentric group and slow eccentric group. Note: type 1 fibers are "slow-twitch," IIb's are "extreme fast-twitch."
-casualbb