ah the whole 'lactic acid' fiasco .. this still gets bantered in gyms usually by some 19 year old bird chested guy trying to be smart or those perma bulkers walking around with a belt with their chest puffed out
lactic acid develops during your set, it is that burning feeling you notice. reducing lactic acid is completely counter productive. so don't listen to any dumb magazine trying to scare you.. all those magazines parrot the same cookie cutter crap and bs cherry picked studies