Then why do almost all power lifters do it (including me) and we gain a lot more strength faster than those who use lighter weights and more reps?
Curious to know if there is any reasoning behind it.
Actually, there is a reason behind it. Bodybuilders don't go too low, as far as rep ranges are concerned, because they're more concerned with fatiguing the muscles than with neurological adaptation. Powerlifters are lifting for numbers. They not only want the muscle fibers to get stronger, but they want as many fibers firing as possible, at as high a percentage of their their power output as possible. Of course, the muscle fiber will grow. But not like it would if they lifted like a bodybuilder. Likewise, bodybuilders do get stronger, but not as quickly or explosively as would a powerlifter, unless they lifted like a powerlifter. Of course, you can lift too light to accomplish anything other than tiring yourself out; but who'd want to do that?
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