Editors' Pick Midlife Physical Activity and Cognition Later in Life: A Prospective Twin Study. Iso-Markku P, Waller K, Vuoksimaa E, Heikkilä K, Rinne J, Kaprio J, Kujala UM J Alzheimers Dis. 2016 Oct 18; 54(4):1303-1317. PMID: 27589524. Abstract