I've been trying to figure out why I had to abort my run on Wednesday.
I've been sleeping well, so a lack of sleep wasn't the problem.
Last Saturday morning I spent three hours spraying Roundup and a broad leaf spray on weeds, and I spent another hour on Tuesday with the broad leaf spray. I wore rubber gloves to keep any spills from getting on my skin, but I could smell the spray, indicating I was breathing chemical fumes. However, I had a good run on Monday, and that implies the three hours I spent on Saturday didn't affect me.
On Saturday I got soaked from a rain storm, and that could weaken my immune system. Maybe that was the problem. I was home about half an hour before I changed out of my wet clothes. Again, the good run on Monday sorta negates my being soaked on Saturday.
Another factor was that my diet hasn't been great. Also, I was dehydrated on Wednesday.
Rest seems to have helped with the problem, what ever it was.
During the past 4 weeks (not counting this week) I ran 15, 10, 15, 10 miles, so maybe I was just tired and needed a rest week. I had planned to make the upcoming week a rest week, but the week just ending ended up being a rest week :)