BACKGROUND: Physical activity (PA) is a protective factor against amyloid-β (Aβ) accumulation in adults at risk for Alzheimer's disease (AD). This association, however, may differ by apolipoprotein E ( MATERIALS AND METHODS: Included were 388 cognitively unimpaired, older (mean age ± SD = 68.10 ± 7.09
66% female) participants from the Wisconsin Registry for Alzheimer's Prevention (WRAP) study. The cohort was enriched with both family history of AD at enrollment and a higher overall prevalence of RESULTS: Three-way interactions (Age × PA × CONCLUSION: Individuals with high