And we have lactic acid.

Sunday and Monday I was greater withe some nice, low humidity weather, and did 6 miles and 10 miles up and down the minuteman.  The 10 miler felt good, but I did feel the lactic acid in the legs at about mile 9.  I guess that's good.  Legs felt tired on the way into work, but seemed to be fine by the end of the day.

Last night was a 26 minute walden swim.  This morning I went to the Belmont hull track, and smacked into another "under construction" track.  Two weeks in a row?  The track looked fine, so I decided to do the intervals until someone asked me to leave.  No one did.  I managed 20:43 for 5x1000s.  That is a 6:40 pace.  Slower than the 800s, but faster than the 1600s.