thirty-two wrote:
This does account for the fact that mile is not commonly run outdoors, and almost never run during collegiate athlete's (who I'm assuming make up the majority of the indoor sub-4's) peak season. Therefore there is not significant data to say that it is "easier" indoors than outdoors.
How many runners have run sub-4 indoors than gone on to run faster than the 1500 equivalent outdoors would make MUCH more sense. Unless you honestly believe that the 109m makes the mile easier indoors and outdoors.
For shits and giggles I went back and compared those sub 4:00 American runners' indoor miles against both their outdoor 1500s and mile times, using the most commonly accepted conversion factor of 0.9258
(4:00 = 3:42.2) for extrinsic comparisons. I went back 5 years before I got tired.
80 American runners broke 4:00 in the mile during the last 5 years (not including 2011)
80 = total
52 = indoors
28 = outdoors
Of those 52 milers who broke 4:00 indoors, 39 of them never ran a faster mile again, indoors or out.
39/52 = 75% didn't improve
If you throw the subjective element into the mix, and make an extrinsic conversion of their 1500m times, and lump them together with their mile performances, then 27 out of the 52 never improved on their indoor performances.
27/52 = 51.9%
As I said before "you can see why many people never run faster outdoors than their indoor times."