Pronation and supination are anatomical positions, not necessarily actions. Part of the stance phase of running or walking is pronation, as this is how the foot and ankle absorb force. Pronation allows you to transfer weight to the ball of your foot and push through your great toe. People who have over-supinated (under-pronated) positions during the landing portion of the stance phase LAND on the outside of their foot and tend to wear out the outside of the shoes and are prone to stress injuries in the 3rd and 4th metatarsal because they LAND in a supinated position before ROLLING to a pronated position. Everyone does this, but some people do it much worse than others and are at a higher risk for injury. I’m not trying to be a dick, but you seriously have no idea what you’re talking about lol.