I got there! When I first started running and stretching, I started doing the canonical hamstring stretch after each run. Close your eyes and picture, if you will, graceful and youthful me lithely stretching toward my oh so distant toes and failing miserably to achieve that oh so distant goal. My fingertips lingered in mid-air somewhere past my knee; you could even have imagined them at mid-calf if you had been generously inclined.
But today, ah joyous morning, I was able to reach my toes with both hands for the first time. Photo attached. Whoo hoo!
I have been running for two minutes and then walking for eight (repeating for a total of 30 minutes). Next week, I advance to run three, walk seven.