I did another 6K today, alternating walk/RW 500m each. I still felt tired, dizzy, and fatigued with heavy legs.
I'm wondering if it's the mystery illness again? My resting HR is running a little higher the last few weeks, maybe 53-55 instead of ~50. But that seems inconsequential?
The fatigue is pretty impressive. I fell asleep at a kids' birthday party on Saturday afternoon - while the kids were noisily playing Bingo.
Nothing I can do except wait it out, and do as much exercise as I can tolerate, for mental health if for nothing else.
Garmin data here.