If you notice the section of text I quoted, it stats "High reps will increase your nervous link with a muscle and will make it more efficent at contracting but will not increase size very much. ". This is the statement I was refuting.gsxr1000 said:
Indeed, but the training regimen of a powerlifter and a bodybuilder is different, and don't their physiques reflect that. Bodybuilders tend to train in the midrange of rep #'s, and as such I'd say their physiques look fuller and bigger, and hittman was inquiring about building bigger arms, not stronger arms per se.
On a side note, its not so much rep range that build (ie causes hypertrophy) but a combination of sufficient stress AND fatigue. If you work with a heavy enough wieght with lots of rest between sets you will primarily work CNS and hypertrophy will be second. However, if you work heavy weights with a short rest you bring fatigue into the equation and can accomplish just as much, if not more hypertrophy than mid range reps can. So many people think that rep range is the determining factor for muscle growth but everyone overlooks the aspect of fatigue. As long as the stimulation AND fatigue is sufficient you can gain mass and this can be done either in low rep or mid rep workouts. High rep workouts can surely cause enough fatigue but simply cant stress the muscle enough.