This sounds like a very specific question, but Im only interested in the reason for the general or common impressions I hear on my running form. What I hear much of the time is that I appear to be running in a very casual way or that Im not showing alot of effort. Ive heard this many times from people and even once while running in the snow. Actually once I flipped off a NCO for saying this in the military during sprints because I was actually running my hardest. Recently I heard this during a marathon when I was running at a medium-hard effort. Im surprised because I recently started an effort to run faster, and so I shouldnt appear the same any more because Im not taking it easy as before.
Im interested in my running form and would like to know: What movements differ between the appearance of running casual and running fast?
After all, every still picture of Usain Bolt appears fast.