This is sort of a benchmark run, to determine what kind of leg turnover/potential you have to run the marathon. If you wanna run a 3:20 marathon, you need to be able to comlete 8 to 10 of these 800s in 3:20 or better. If you wanna run a 3:10 marathon, you need to be able to complete each of the intervals in 3:10 or better.
I ran 8 Yasso 800s with a two-minute rest in between each interval.
My splits of the first 7 800-meter intervals were all between 3:09 and 3:03.
I ran the last split as hard as I could and eeked out a 2:35.
I mean, I've had great track workouts before and bombed at the marathons. So, I'm really not too high about this one, though that last interval was 5 seconds faster than my previous fast 800.
But again, woop-tee-friggin-do. I think there are other workouts that determine your marathon fitness, such as long tempo runs or how you perform in a 10-mile to half-marathon race. Besides, my speed is much more developed than my aerobic capacity.