Can exercise boost mental focus?

Works Cited

Medbo, Jon I, Ole M. Sejersted. "Plasma Potassium Changes with High Intensity Exercise."  Journal of Physiology. 421 (1990): 105-122. March 25, 2012. http://jp.physoc.org/content/421/1/105.full.pdf

Miyaki, Asako. Seiji Maeda. Takeshi Otsuki. Ryuichi Ajisaka. "Plasma Pentraxin 3 Concentration Increases in Endurance Trained Men." Medicine and Science in Sports and Exercise. 43.1 (2011): 12-17. http://www.medscape.com/viewarticle/734984

Nauert, Rick, PhD. "Exercise Improves Self-Esteem in Overweight Kids." Psych Central.  (2009). March 25, 2012. http://psychcentral.com/news/2009/03/19/exercise-improves-self-esteem-in-overweight-kids/4839.html

Sharma, Ashish, MD. Vishal Madaan, MD. Frederick D. Petty, MD, PhD. "Exercise for Mental Health." The Primary Care Companion to the Journal of Clinical Psychiatry: Official Journal of the Association of Medicine and Psychiatry. 8 (2006): 106. March 26, 2012. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1470658/