When you place the thenar space of your hand (the area between your thumb and forefinger) up against the bottom of your
breast (usually for guys) and measure how much muscle mass there is in your pectorals. usually, if you have big pec muscles, then you
will have greater hang
time.
Rob: Dude, I need to start working out my
hang time is low
Bob: I know man, you are looking a little thin.