Last night I found myself unable to sleep, my insomnia brought about laying in bed trying to visualize myself running a mile in under four minutes. The thought doesn’t seem that unreasonable, just a tiny bit more than four times around a 400m track in slightly under four minutes, nothing to it, right? After all, it is only four minutes! Then I began thinking about how so few runners ever break the four minute mark and why. Is it because most who try do not go about it the right way? Could smarter training have helped them succeed in their goal, or are most people limited in some way by a genetic speed cap of some sort for various distances? What is the true limiting factor of human running ability assuming leg speed is not an issue? So many questions, so few answers.
In order to run a four minute mile, one must average fifteen miles per hour across the whole distance. Most average people can’t even run this fast, even in an all-out sprint. Those who have a top speed of fifteen mph might be able to maintain that pace for 100 meters at best - 15 seconds - 1/4 of a minute, even if they have been running for years. It is a lot to ask of the human body to maintain that speed for four minutes straight.
I think that my top speed when deconditioned is somewhere around 20 to 22 mph. I am hoping that with the introduction of speed-focused training starting in March, and the onset of 100% effort speedwork in May, that I will raise my 200 meter sustainable top speed to somewhere between 24 and 25 mph, which should give me a nice buffer in which to work at higher endurance, hopefully increasing my anaerobic threshold speed to somewhere around 12.5 to 14 mph eventually. 14 mph may be pushing it, but I’m pretty sure 12.5 is doable in a couple of years.
I could not sleep easily that night because there are so many unanswered questions about my top speed that I just want to know, but must stick to my plan, so they will stay unanswered until May, unfortunately. All I can say is that this is quite the goal I’ve set for myself, but I will not give up, not until I have convinced myself beyond a reasonable doubt that I am yet another of the many runners who is physically incapable of a sub four, no matter how hard I try.