This reminds me, am I the only person who thinks the earlier version of Kipchoge carried his arms higher, specifically a smaller elbow angle and slightly less opening at the elbow throughout his arm pump? I'm not sure when exactly it changed, and if it coincided with the introduction of the super shoes. I think Kipchoge's arms were higher until at least Rio 2016 though, and it's not until the INEOS 1:59 that I felt he had definitively lowered them. Perhaps this is all in my head, or just an illusion of his clothing / camera angle?