1. From the Department of Exercise Science (K.J.H.), Thomas Jefferson University; Department of Neurology (C.A.L., A.E.W., A.L.S.), University of Pennsylvania Perelman School of Medicine; Department of Neurology (H.E.), Hospital of the University of Pennsylvania; Memory Impairment and Neurodegenerative Dementia (MIND) Center (B.G.W.), University of Mississippi Medical Center; Department of Neurology (P.P.), University of North Carolina Chapel Hill; Department of Medicine (S.P.J.), Beth Israel Deaconess...