Three mile thursdays

My new workout for Thursdays is either a set of 3 one mile repeats with 6 minutes easy in between or a straight out 3.1 mile TT. I'm going to try to do this consistently over the next 3 months and track my progress.  Today, a did the 3 one mile repeats on a very tight 12 laps/mile track at about 6:20 /mile pace.