Maybe marathon runners are on to something with all that training they do to run 13.1- and 26.2-mile races? Man’s ability to outrun or to walk faster than most other mammals over long distances also may have contributed to his sharper brain than the others.
That is the corollary between brain development and exercise explored in this story from the New York Times.
The argument presented is rooted in the premise that we continue to require regular physical activity for our brains to function optimally. The report also references a seminal article published by the University of Utah, Endurance Running and the Evolution of Homo, by evolutionary biologists Daniel E. Lieberman (Harvard University) and Dennis M. Bramble (University of Utah).