When the foot does not roll inward enough after the outside of the heel hits the ground, this results in Underpronation. The act of underpronation is visually depicted by an individual running on a treadmill; as the runner slows down via slow motion, one can see that the excess pressure of the body is only bearing down on the outside edges of the person's feet, as the foot neglects to roll inward. One can tell if they are underpronating by checking their footwear (running shoes, etc.), to see where the majority of daily wear is impacting the shoe the most. As shown in the video, if the majority of the wear is on the outer edges of the shoe, this means the person is prone to underpronation. After watching this video, a person will accurately be able to decipher if they are prone to underpronation.