A recent study investigates the impact of a 24-week resistance exercise (RE) program on Alzheimer’s disease (AD) brain signatures in cognitively unimpaired older adults. Conducted with 90 participants aged around 72 years, this randomized controlled trial revealed that those engaged in RE exhibited a significant reduction in the thickness/volume signature associated with AD compared to a wait-list control group. Notably, this effect was more pronounced in participants who were Aβ-positive, suggesting a potential moderating role of amyloid beta status in the response to exercise interventions.

The findings underscore the therapeutic potential of resistance exercise in mitigating early AD-related brain changes. The reduction in the thickness/volume signature—an indicator of macrostructural brain health—was linked to improvements in executive function and attentional/inhibitory control, indicating that exercise may foster adaptive brain changes rather than detrimental ones. However, the study did not find evidence that changes in AD signatures mediated cognitive outcomes, pointing to a more complex relationship between brain structure and cognitive performance.

This research shifts the paradigm regarding non-pharmacological interventions in aging and cognitive decline, suggesting that targeted exercise regimens may serve as a viable strategy for modifying AD-related brain changes, particularly in at-risk populations. The implications for drug development and clinical practice are significant, as integrating exercise into treatment protocols could enhance cognitive resilience and potentially delay the onset of AD symptoms in vulnerable older adults.

Source: academic.oup.com