RT Journal Article SR Electronic T1 Personalising exercise recommendations for brain health: considerations and future directions JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 636 OP 639 DO 10.1136/bjsports-2016-096710 VO 51 IS 8 A1 Cindy K Barha A1 Liisa A Galea A1 Lindsay S Nagamatsu A1 Kirk I Erickson A1 Teresa Liu-Ambrose YR 2017 UL http://bjsm.bmj.com/content/51/8/636.abstract AB The societal value of strategies that delay the onset and progression of dementia cannot be overstated. Physical activity—unstructured and structured—is a promising, cost-effective strategy for the promotion of brain health. However, a large degree of variation exists in its efficacy. Therefore, to increase its utility as ‘medication’ for healthy cognitive ageing, it is imperative to identify key moderators and mediators of the positive effects of targeted exercise training on brain health. In this commentary, we focus on the type of targeted exercise training, the determinants of individual variation, including biological sex and genotypic factors, and the mechanisms by which exercise exerts its influence on the brain. We argue that a better understanding of these factors will allow for evidence-based, personalised, tailored exercise recommendations that go beyond the one-size-fits-all approach to successfully combat dementia.