The association between aerobic fitness and executive function is mediated by prefrontal cortex volume.
Brain Behav Immun 2012 Jul 7;26(5):811-9. Epub 2011 Dec 7.
Department of Psychology and the Center for the Neural Basis of Cognition, University of Pittsburgh, PA 15260, USA.

A functional MRI investigation of the association between childhood aerobic fitness and neurocognitive control.
Biol Psychol 2012 Jan 4;89(1):260-8. Epub 2011 Nov 4.
Department of Psychology & Beckman Institute, University of Illinois at Urbana-Champaign, 405 North Mathews Avenue, Urbana, IL 61801, United States.

Functional connectivity: a source of variance in the association between cardiorespiratory fitness and cognition?
Neuropsychologia 2010 Apr 15;48(5):1394-406. Epub 2010 Jan 15.
Beckman Institute & Department of Psychology, University of Illinois at Urbana-Champaign, 405 N. Mathews Ave, Urbana, IL 61801, USA.