Notes
This was a very tough day. My plan was a 20 minute tempo run at about 6:30 pace, but I ended up having to make other plans. After 10 minutes at 6:50 pace I stopped when I realized that I was pretty much redlining to go under 7:00 pace. I jogged 5 minutes and planned to do another 10, but I had to stop at 4.
Something is very wrong with my aerobic capacity, I should be able to run a few miles at 6:30 pace without much struggle. I'm going to plan on breaking these runs into segments from now on, until I can handle hard aerobic paces again.