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.

Longitudinal invariance and construct validity of the abbreviated late-life function and disability instrument in healthy older adults.
Arch Phys Med Rehabil 2011 May 1;92(5):785-91. Epub 2011 Apr 1.
Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 906 S. Goodwin Avenue, Urbana, IL 61801, USA.

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.