I have been running Yasso 800s for 2 years now. Developed by Runner's World's Bart Yasso, Yasso 800s are a way to run intervals by which you can predict your marathon race time. You run 10 800s, with a 400 jog break in between, and your average time on the 800s predicts your marathon time. So if you run them in an average time of 3 minutes 20 seconds, you should be able to run a marathon in 3 hours 20 minutes.
|Bart Yasso, super runner and super nice guy.|
Well, if I had ever run on a track, I would know that when runners talk about 800s, 400s, 1600s, or whatever, they are referring to meters! As my friend pointed out, I should be running 800 meters per interval, not 800 yards! Eight hundred meters is .4971 mile, so this morning I reset my Garmin for intervals of .5 mile. That extra 4/100 of a mile may not sound like much, but it adds 211.2 feet to each interval.
Like I've said, I have, on occasion, run 3:20 or faster Yassos, in anticipation of being in the ballpark for a 3:20 marathon. I probably ran my Yassos today as fast as I've ever run, but since I ran 800 meters instead of 800 yards, I only averaged 3:31. I think I'll still run with the 3:20 pace group at White Rock, hoping against hope that I'll find some way to finish in that time. But more realistically, I would expect to be able to finish in the 3:31 range. Run and learn.