A randomized trial reports structural brain differences and improved executive function in older adults following a supervised resistance exercise routine.
By yourNEWS Media Newsroom
A controlled clinical study has found that a structured resistance training program may be associated with measurable changes in brain structure linked to early Alzheimer’s disease vulnerability, according to findings published in Age and Ageing.
The research involved 90 adults between ages 65 and 80 who showed no cognitive impairment at the outset. Participants were randomly assigned to either a supervised strength training group or a non-exercise control group. Over a 24-week period, those in the intervention group completed three weekly sessions lasting one hour each, using elastic resistance bands and bodyweight exercises under professional supervision.
Researchers used MRI imaging to track structural changes in brain regions known to be affected in Alzheimer’s disease, including the hippocampus and entorhinal cortex. They developed a composite measurement of cortical thickness and volume to evaluate changes over time.
The study reported that participants in the exercise group showed a reduction in this composite brain signature compared to those in the control group. While decreases in brain volume are often associated with degeneration, the researchers interpreted this result differently in this context. They suggested that, in the earliest stages of Alzheimer’s pathology, certain areas of the brain may temporarily exhibit abnormal thickening before later shrinkage occurs, and that resistance training may help normalize this process.
The observed effect was most pronounced among participants identified as amyloid beta-positive—individuals who showed early biological markers of Alzheimer’s through PET imaging but had not developed symptoms. Researchers described the changes as adaptive, indicating a potential modification of early disease-related processes.
In addition to structural differences, participants who exhibited reductions in the brain signature also performed better on tests measuring executive function. The study noted this association but stated that it could not establish a direct causal link between the brain changes and improvements in cognitive performance.
The exercise program was designed using accessible equipment, including resistance bands, suggesting that similar routines could be implemented in lower-cost or home-based settings. Researchers highlighted this aspect as a practical consideration for broader adoption.
Despite the findings, the study authors emphasized limitations, including the relatively short duration and the need for extended follow-up to determine whether the observed changes translate into a reduced risk of cognitive decline or progression to Alzheimer’s disease.
The results contribute to ongoing research examining non-pharmaceutical approaches to brain health in aging populations, with further studies expected to evaluate long-term outcomes and potential integration with other lifestyle interventions.
Source: Natural News
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