Amazing what a day does. Today I felt great. I ran in the early morning. My set was a 47 minute run with a 24 minutes at high threshold pace. I warmed up for 10 minutes, with HR @ 145, then pushed my HR to 185 for 24 minutes. During this span I covered 4 miles! Wow that is 6 minute miles. Fastest that I have done for even that amount of time. Cooled down for 13 minutes graduallly lowering my HR back to 135. Total distance 6.65 miles.