snowdays wrote:
here's the way i look at it:
both a middle distance runner and a long distance runner need to be aerobically fit, and both require specificity.
faster mileage can provide some specificity to a long distance runner, but 6:00/mi "easy runs" aren't really much more helpful than a 7:30/mi run to someone who is racing below 4:00/mi pace. so the middle distance runner can run as slow as they want on regular runs as long as they're getting volume and cranking the speedwork that provides the specificity.
"well snowdays, if you're such a genius why don't any pro middle distance runners run 150 slow miles per week?"
yeah, they don't. the catch here is that for the mid distance runner, the aerobic strength doesnt even necessarily need to come from running at all. running a billion slow miles is time consuming and more of an injury/load risk than cross training...
hence why there are so many 20-35mpw 800m runners these days who are basically long sprinters that do a fair bit of crosstraining.
I think what you're saying makes sense. I wonder how much cross training really helps. There is a swedish speed skater (Nils van der Poel) that cross trains 30 hours a week (non skating) and races his 10k in 12 and a half minutes (skating) after transitioning to some very intense weeks after that base. Seems crazy to spend 30 hours a week training for a 12 minute race, but maybe that has carry over to running?