I meant to post yesterday morning's run much sooner but just got too busy. Basically my stock standard Tuesday morning route to Komazawa Park with a few loops for 14 km in 1:03.
Average HR of 140. So a bit harder than Monday and heart rate drift was noticeable. It was meant to be lower aerobic, and the average heart rate definitely is, but late in the run I was straying into upper aerobic territory. I am determined to try and stop doing that so that a lower aerobic run stays in lower aerobic territory the whole way. Most important.