From the School of Psychology (S.B.-C.), National Institute for Health innovation, School of Population Health (V.P., Y.J.), Department of Neurology, Centre for Brain Research (P.A.B.), and General Practice and Primary Healthcare, School of Population Health (B.A.), University of Auckland, Auckland, New Zealand; National Institute for Stroke and Applied Neurosciences (R.K., E.W., V.F., A.J.) and Centre for Physical Activity and Nutrition (E.R.), AUT University, Auckland, New Zealand; Health Research Council New Zealand, Auckland, New Zealand (K.M.); Department of Psychology, Waikato University, Hamilton, New Zealand (N.S.); and Clinical Trial Service Unit and Epidemiological Studies Unit, University of Oxford, Oxford, United Kingdom (D.B.). s.barker-collo@auckland.ac.nz. From the School of Psychology (S.B.-C.), National Institute for Health innovation, School of Population Health (V.P., Y.J.), Department of Neurology, Centre for Brain Research (P.A.B.), and General Practice and Primary Healthcare, School of Population Health (B.A.), University of Auckland, Auckland, New Zealand; National Institute for Stroke and Applied Neurosciences (R.K., E.W., V.F., A.J.) and Centre for Physical Activity and Nutrition (E.R.), AUT University, Auckland, New Zealand; Health Research Council New Zealand, Auckland, New Zealand (K.M.); Department of Psychology, Waikato University, Hamilton, New Zealand (N.S.); and Clinical Trial Service Unit and Epidemiological Studies Unit, University of Oxford, Oxford, United Kingdom (D.B.).