why do people like the pump so much??? its not what ur actual growth is...how did u feel outside of the gym? when u werent workn out...
Besides of the psychological factor, it's really inspiring, to me it means I just didn't workout but I trained hard.
If not mistaken (I'm old school) pumping your muscles will promote growth and expansion by forcing as much blood into the target muscle as possible.
I'm not an expert but it should be something behind the pumps since there are supplement made just for that as well as routines
But again what do i know.