[quote]GluteusGigantis wrote:
Professor X wrote:
I think his problem was with me stating openly that “sarcoplasmic hypertrophy” based on training style has not been proven to occur in humans beyond that normally associated with muscle growth.
This debate began in 2006. You had some authors beginning to use “sarcoplasmic hypertrophy” back then to state that bodybuilders were “weaker”…as if to provide more substance to their “anti-bodybuilding training programs”. When I began asking where the proof was of this, some fan boys got pissed.
It looks like there is no proof and never was in the first place outside of a rat model.
Damn straight about that. Anyway, the difference in strength between bodybuilders and powerlifters has been identified as the difference in type II fiber hypertrophy (p-lifters bigger type IIs, especially IIb) whereas bodybuilders achieve better balanced hypertrophy of IIa, IIb, and I. So you could argue that bodybuilders train more functionally 
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Honestly, I don’t really even think this is so much the case. It has more to do with specificity, training style, and genetics than it does with having bigger type 11b’s.
Powerlifters train specifically for 1RM strength (meaning they do a lot of 1RM’s and train with this goal in mind). This most likely leads to improved rate coding and other neurological improvements which aid them while trying to put up maximum single lifts. Many however also do a fair bit of “repeated effort” work, accessory work and some even energy systems work which targets the type 11a and type 1 fibers.
Most bodybuilders on the other hand are not interested in maximum single lifts and therefore do not train for them. Many rarely go below 4 repetitions and therefore don’t get the same neurological improvements as the powerlifters. They still are recruiting all of their fibers though by either going heavy (3-4 reps is likely enough to recruit all fibers) or going to failure with moderate reps (which also recruits all fibers).
There are powerlifters who have quite a lot of muscle on them (Tate, Kroc, Kaz, etc…) and bodybuilders who are very strong (Ronnie, Jackson, Harris, etc…). So making blanket generalizations about either group is a little misleading.