Notes
Pretty much a stock standard run. The drift in heart rate was pretty obvious. It was supposed to be a lower aerobic, but from lap 2 onwards my heart rate was frequently a few beats higher than needed to qualify for lower aerobic. But you get into a rhythm and the pace feels good, so it is so hard to exercise the discipline to stay below that cap. Not that it hurts so much in this case as it is still well and truly in aerobic territory. It is more about just steadily and patiently building that base at the lower end and building the body up, not breaking it down.