Exactly four weeks ago I mentioned I had hit an aerobic plateau , with the plan to change up the workout routine and try again afterwards. So today I tried the same intervals workout on the treadmill that I wasn't able to complete two other times, and the result was ... still couldn't finish it =(. On a positive note, I got farther this time than I have in the past. I think there are a few interesting things here. First, I didn't lose any aerobic fitness during my two-week vacation, and perhaps even gained some, which is great. Next, the bike sprints didn't translate over to running aerobic capacity quite as dramatically as I would have liked. I did three treadmill workouts over those four weeks, and the rest on the bike. Anyway, in retrospect, it seems that I simply bit off more than I could chew. When I went from my previous completable interval workout to this one, I took about 9.16% off the mile pace for the sprints. Apparently that was way too aggressive. I should...