Smoove wrote:
There is a really good chance that you didn't improve because your intervals were so short in duration in some workouts that you were not getting enough work in during any given interval to get your body fully up to vo2max effort until late in the interval.
I shoot for all of my intervals to be at least 3:00 long and no longer than 5:00; which is why I rarely run intervals of less than 1000m (although I do 200s and 400s from time to time early and late in a season, but I think of those as reps rather than intervals, and those are for fine tuning, not for major fitness improvements).
You are suggesting I didn't do anything longer than 1000m in college, which is incorrect. We did reps of up to 2 miles during XC, and did 1500s and 2ks along with a ton of 1000-1200m reps during track season. Perhaps we didn't do them enough (or, when we did do them, they were run too hard) but they were there.
And I said I DID improve when shortening things to no more than 2-3 minutes. So dropping longer reps certainly didn't hurt me all that much (though again, my improvement could have been due to any number of things including improved training environment).