I am thinking seriously about adopting the minimalist 3-days-per-week marathon training plan from Runner's World. I was figuring out my FIRST training paces based on my last 10K race in which I finished in 1:03:24.
But I didn't actually write any of it out - I was just figuring out the paces partly in a spreadsheet but mostly in my head.
Then yesterday I went over to the track thinking I'd try to see how I did on four 1-mile repeats. I had a 2:20 lap/9:20 mile pace in mind for repeats for some dumb reason. Which, in retrospect, makes absolutely no sense at all, because my one mile PR right now is 9:23. And I finished a 5-mile track workout just 2 days prior.
So I managed ONE 9:46 mile, at a maximal effort level. And limped around the track for another few miles in the 12-minute range.
This is what happens when I don't do my usual meticulous planning! Winging it just doesn't work! Back to the drawing board. . . . Yeah, I could pay a coach to do the math for me, but I trust the calculations more if I do them myself. And then write down my answers, circled.