I new it all along.  I don't know if you remember my comments on one of your blogs that mentioned the book " The Genius of Flexibility" by Bob Cooley, but the stretches he uses in the book are all "resistance" stretches.  David, you were looking for a way to incorporate resistance training into your routine - this is it!  You probably stretch a little, before walking, running, etc.  Just add some resistance to the stretch!  You get a much better stretch, and you can add muscle tone to boot.  I stretch with a strap attached to my legs before I go to bed at night.  Originally, this was to releive calf cramps that I developed, but over time I have found it helps me sleep better, and I don't wake up suddenly hopping around with a bad cramp. (How many of us have done that?).  I have also found (and it's mentioned in the book) that if you do the stretch properly, it strengthens as well as increases flexibility.  P.S.  I'm not trying to sell this man's books - his methods just work very, very well and I think this would be a great tool for the diabetic community.  And, by the way, the format works just fine.