It Doesn't Matter How Man Reps You Do If They All Suck
We've been programed to believe that numbers matter. When exercising, the rep that matters most is the you're on. Make every aspect of this rep perfect and then worry about the next one. The goal is to optimize muscle contraction period! Your muscles can't count and don't care if you did 10, 15, or 20, which are all arbitrary. 20 mindless reps = ZERO valuable ones.