In three weeks, I will once again have the honor of running the Boston Marathon as a member of the gasping geezers division of the Dana-Farber Marathon Challenge team. A year ago, as I clambered up the Newton Hills, I resolved that, if I was ever fool enough to do this again, I’d lose a few pounds before attempting it. Admittedly, a few miles later, I made a sterner vow that I would never be fool enough to do this again, which made the first resolution seem irrelevant.