Week 12: Speed work

Today was 5x400 meters.  I found out that the block around my house was about 500 meters.  I did 5 laps.  I ran the first 400 was at 5k pace and walked the last 100.  The last lap was a little more difficult.  I wasn't tired, but my legs just wouldn't go any faster.  Afterwards I drank an XS and stretched.  I'm going to be sore tomorrow.