Chronic endurance exercise training prevents aging-related cognitive decline in healthy older adults: a randomized controlled trial.
Muscari A, Giannoni C, Pierpaoli L, Berzigotti A, Maietta P, Foschi E, Ravaioli C, Poggiopollini G, Bianchi G, Magalotti D, et al. Int J Geriatr Psychiatry. 2010 Oct; 25(10):1055-64.