Notes
Last run before marathon, but later noticed this wouldn't be far off a MAF test, given HRs ~138.
So if pace for 1st MAF test mile - 15 sec to be an accurate marathon predictor, then marathon pace would be 7:53. One week later, ran with 7:51 average. So there might be something in this. Target was 7:15, so I'd like to have had MAF pace at 7:30 at this point.