I prepared a full, short paragraph explaining that I felt unaccountably tight and sluggish this morning. I was resigned to having fallen back to the 10:30-ish timing, and in the home stretch reminded myself that the slow days aren’t a problem, because they helped my body get in better shape to run faster the next time.
When I finally got home, I was stunned to see that I had set a new personal best. 11°, mild breezes (head wind out, wind at my back on the way home, which surely helped). 9:57.