There wasn't anything much really new in that article that we didn't go through here:
I think Primalchild has it spot on, as walking could explain everything listed in the article. There was nothing that seemed to leap out as being specific to running long distances
The "Seven Deadly Sins"
Grains (wheat/rice/oats etc) . . . . . Dairy (milk/yogurt/butter/cheese etc) . . . . . Nightshades (peppers/tomato/eggplant etc)
Tubers (potato/arrowroot etc) . . . Modernly palatable (cashews/olives etc) . . . Refined foods (salt/sugars etc )
Legumes (soy/beans/peas etc)