That was one of my problems. I didn't. In my book, Rule #1 in marathon training is don't change anything once your training is in full swing (~ ten weeks). Follow the training schedule. Don't change shoes. Don't introduce weird food into your diet. Don't paint the house/lay sod/go ice skating three weeks before the race, etc. Well I was very conscientious in that regard but now as I continue to diagnose my left side problem I remember a few more things I DID change. I mentioned earlier that I unlaced one hole in my shoes. I also tightened the laces a little more around my foot. I am thinking that is what made my foot hurt. The metatarsals were too cramped in my shoe and causing aggravating injury to muscles. I also stopped eating yogurt about four weeks before the race which was my main source of calcium after I switched from a high calcium multi-vitamin to a different one with only 20% daily requirement. At the time I made those decisions it did not register with me that they would have adverse effects.
It's always something. And the farther you run the more the little somethings become big somethings. And the next thing you know, it's a problem.
Oh, and it was winter time so I was off my diet of ice cream cones.
Today I followed Runner Susan's advice and ran easily. And short. I did just 3 miles at just under 10 minute pace. Very easy. And nothing hurts at all. That was satisfying.
Gosh; that's twice this week I've gone for a run. I must be coming back folks.