Over the past few seasons, one thing has remained constant. Regardless of how fast I am, there will be workouts that go well and workouts that don't. I suppose I could be a world record holder and I would probably still have the same experience. However, I am suspicious that nearly all of my Thursday workouts don't go super fast (with the exception being last Thursday when my workout was in the morning). I need to consider not doubling on Thursday in my opinion. Today I thought I was ready for 4 miles in 20 minutes. I hit mile 1 in 4:59 feeling fine. But I started feeling more tired through mile 2. I turned around at 10 and didn't get back till 15:17 (leading me to believe that I ran something like 5:05 and 5:17, but that is just speculation without a marker). Last mile I was redlining and only ran 5:23. That was pretty bad. Oh well.