KAPOW!  I kicked it up a notch, again, on the treadmill today.  I went back to 40 minutes, all at 3 MPH…  however, today I did 2 sets of 10 minute intervals GOING UP HILL at 4.0!  “Holy heart failure Batman!” (yes, he really said this:   http://www.youtube.com/watch?v=bHjRwCu6yBY ) and no, no one actually  had to perform CPR…

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