"...too slow to qualify as exercise."

This may not be deserving of an entire heading in our journal, but I thought it merited attention on the remote chance that anyone actually reads these things, much less takes them seriously.

Slightly reworded for our purposes, the actual quote is

Running at less than 60% HRmax is too slow to qualify as
exercise.

Follow the link for the full description. This for sure matches my experience.

More on the rest of the information at this link, later. It's helping me develop a coherent model of what I'm doing with running.