tired legs

Yesterday I ran 13 minutes.  I had the idea to run on tired legs for an hour or so since that's what I'll need to do to prepare for a 50 miler.  I got about 8 minutes from home, heard a clap of thunder and immediately turned right around.  The plan wasn't to get any speed work in but that changed when the drops kept getting bigger.  Still the ultra shuffle, just a bit quicker pace.