Physical Activity Tied to Improved Brain Function in Older Adults

A new study has found that even small amounts of moderate-to-vigorous physical activity may help preserve cognitive function in older adults, adding to the growing evidence that how people use their time each day plays a critical role in brain health.

The study, published in Age and Ageing, analyzed data from 585 adults between the ages of 65 and 80. These adults participated in the US-based IGNITE study, which examined the impact of daily time use, covering sleep, sedentary time, light activity, and moderate-to-vigorous physical activity, on cognitive performance.

In Mexico, fewer than half of adults over 53 report exercising regularly, raising concerns about how inactivity may impact healthy aging. As the population of older adults in Latin America grows rapidly, these findings underscore the need for proactive public health strategies that encourage physical activity and address the challenges of an aging society.

Unlike previous studies that looked at lifestyle factors in isolation, this study used a 24-hour time-use composition model to explore the relationship between physical activity and brain function. The results suggest that cognitive performance, particularly in areas such as processing speed, short-term memory, and executive function, improved in individuals who spent more time in moderate-to-vigorous activity, such as brisk walking, cycling, or dancing.

The most notable gains were observed among participants who previously engaged in no moderate-to-vigorous activity and then began doing at least five minutes daily. This improvement occurred regardless of whether the time came from sleep, sedentary behavior, or lighter physical activity.

While the study was cross-sectional and cannot establish causality, the authors plan to conduct longitudinal research to further explore these findings and inform future public health guidelines related to dementia prevention.

Another recent study found that brief periods of moderate-to-vigorous activity were also linked to significantly lower risks of cardiovascular events and premature death, reports MBN. These findings suggest that incorporating short bursts of more intense activity into daily routines could serve as a practical and accessible strategy to improve both heart and brain health as people age.