Alzheimer's & dementia : the journal of the Alzheimer's Association, vol 13, iss 11 Alzheimer's and dementia 13(11), 1197-1206 (2017). doi:10.1016/j.jalz.2017.03.008
Introduction The objective of this study was to evaluate the relationship between self-reported exercise levels and Alzheimer's disease (AD) biomarkers, in a cohort of autosomal dominant AD mutation carriers. Methods In 139 presymptomatic mutation carriers from the Dominantly Inherited Alzheimer Network, the relationship between self-reported exercise levels and brain amyloid load, cerebrospinal fluid (CSF) Aβ 42, and CSF tau levels was evaluated using linear regression. Results No differences in brain amyloid load, CSF Aβ 42 , or CSF tau were observed between low and high exercise groups. Nevertheless, when examining only those already accumulating AD pathology (i.e., amyloid positive), low exercisers had higher mean levels of brain amyloid than high exercisers. Furthermore, the interaction between exercise and estimated years from expected symptom onset was a significant predictor of brain amyloid levels. Discussion Our findings indicate a relationship exists between self-reported exercise levels and brain amyloid in autosomal dominant AD mutation carriers.
