I ran or what some people also call jogging for over 10 years. I was never a fast runner and in fact I used to joke that I brought up the rear. I never finished last in the 5 or 10 km runs or half marathons or marathon but I was also never in the top one-third finishers. I didn't mind my race results as I felt fit, I had decent form and I knew that I was built for endurance and not speed. I felt sometimes like the Ever Ready bunny in the battery commercials. I once read an interesting article in Scientific American that explained long and short muscle twitch and that great thoroughbred race horses had short muscle twitches. I definitely have long muscle twitches.