Yale research shows many older adults experience notable cognitive and physical improvements, challenging common perceptions of aging.
This research received support from the National Institute on Aging.
In a recent analysis of data spanning over a decade, researchers found that nearly half of adults aged 65 and above exhibited measurable enhancements in cognitive or physical functions.
The evidence indicates that improvements in later life are more common than typically perceived.
“Many equate aging with an ongoing decline in physical and cognitive abilities,” stated Becca R. Levy, the lead author of the study and a professor at the Yale School of Public Health. “Our findings demonstrate that improvement is actually prevalent and should be recognized as part of the aging narrative.”
The research team examined data from the Health and Retirement Study, which includes over 11,000 older Americans as part of a federally funded longitudinal survey.
Changes in cognitive function were assessed through a comprehensive cognitive assessment. Physical ability was gauged using walking speed, a crucial health indicator correlated with disability, hospitalization, and mortality risks, as noted by geriatricians.
Participants were monitored for up to 12 years. Notably, 45% showed improvement in at least one of the two examined areas.
About 32% of participants demonstrated cognitive improvements, while 28% improved physically. Many of these changes were significant enough to be deemed clinically meaningful. When researchers included individuals whose cognitive abilities remained stable, more than half the cohort avoided the often-expected cognitive decline.
“What's remarkable is that these improvements are masked when looking solely at averages,” Levy pointed out, who also authored the book Breaking the Age Code: How Your Beliefs About Aging Determine How Long & How Well You Live. “Aggregated data reveals decline, yet individual trajectories tell a more positive story. A substantial percentage of older participants actually improved.”
The study also sought to understand the reasons behind the varying outcomes among older adults.
One hypothesis centered on the influence of preconceived notions about aging at the outset of the study. The researchers assessed whether participants held positive or negative beliefs about aging.
The findings corroborated this idea; those with a more positive outlook towards aging were significantly more likely to show improvement in both cognitive testing and walking speed. This correlation persisted even after adjusting for age, gender, education, chronic diseases, depression levels, and follow-up duration.
This research expands on Levy's stereotype embodiment theory, which suggests that societal stereotypes surrounding aging, often absorbed through media and advertising, can profoundly impact individuals and manifest into tangible biological effects.
Previous studies led by Levy established a link between negative beliefs about aging and outcomes such as diminished memory, slower walking, heightened cardiovascular risk, and markers associated with Alzheimer's disease.
Conversely, Levy emphasizes that adopting more positive beliefs about aging can lead to favorable results.
“Our findings indicate that many older adults possess a reserve capacity for improvement,” she elaborated. “As beliefs about aging can be altered, this suggests potential for interventions at both individual and societal levels.”
The observed improvements weren't limited to individuals who began with cognitive or physical challenges.
Even participants starting with normal physical and cognitive abilities often showed notable advancement over time, countering the notion that such gains merely result from recovering from illness or setbacks.
The authors aim for these results to reshape public attitudes towards aging and diminish the belief in a relentless decline. Furthermore, they advocate for increased investment in preventive care, rehabilitation efforts, and health-promoting services designed to empower older adults to enhance their resilience and spur improvement.
Co-author Martin Slade, a lecturer in occupational medicine at Yale School of Medicine and the Department of Environmental Health Sciences at YSPH, contributed to the study.
This research was made possible thanks to funding from the National Institute on Aging.
Yale University provided the materials. Note: Content may be modified for clarity and brevity.
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