I did not beat Wednesday’s four-second mile this morning, but I did operate the timer correctly, and I did make it home under 10:30. The temperature was only 3°, which combined with the phlegm still glopping up my throat and chest to make my breathing less efficient. I set an optimistic pace, but gradually fell back to a basic slog as my wheezing and gasping got less oxygen into my blood. Mild tingle in my right calf in the last 100 metres or so. Final time, 10:27.