Enhancing memory through physical activity: beneficial effect on internal memory strategy use in older adults

Area of Science:

• Cognitive Psychology
• Neuroscience of Aging
• Gerontology

Background:

• Aging is associated with declines in memory performance and the use of cognitive strategies.
• Physical activity (PA) is increasingly recognized for its potential benefits on cognitive function in older adults.
• Subjective organization, a measure of memory strategy use, has not been extensively studied in relation to PA in aging populations.

Purpose of the Study:

• To investigate the relationship between physical activity (PA) levels and subjective organization strategies in older adults.
• To examine the effects of age on memory performance and subjective organization.
• To determine if subjective organization mediates the association between PA and memory recall in different age groups.

Main Methods:

• A comparative study involving younger and older adults (N=90) assessing memory recall and subjective organization (pairwise frequency index, PFI).
• Participants completed memory tasks involving word lists and reported their past year's physical activity levels.
• Statistical analyses included General Linear Models and mediation analyses to examine age, PA, and PFI effects on memory.

Main Results:

• Younger adults demonstrated superior memory recall and subjective organization compared to older adults.
• Higher PA correlated with better memory performance in both age groups.
• In older adults, higher PA was significantly associated with increased subjective organization, and this organization partially mediated the PA-memory relationship (39% of the effect).

Conclusions:

• Higher physical activity levels in older adults are associated with enhanced memory recall and the utilization of subjective organization strategies.
• Subjective organization plays a mediating role in how physical activity benefits memory during the aging process.
• These findings highlight the importance of PA for maintaining cognitive function, specifically memory strategies, in later life and suggest implications for executive functions.