6 miles of speed work.

This morning after I warmed up with 10 minutes of Pilates, I headed over to the park to do some speed work.  I set my Garmin to beep every 1/4 mile, then I started with a walk for the first 1/4 mile then ran at approximately 6-7.5 min./mile pace for the next 1/4 mile, then repeated until I had done 12 repeats of the running portion, for a total distance of 6 miles, then I walked home.  When I got home my legs were feeling really sore and tired, so I did another 15 minutes of Pilates to stretch out.