Study Shows Some People Actually Get Stronger and Sharper With Age

For decades, the narrative around aging has focused on inevitable decline: slower steps, fuzzier memories and fading strength. But a growing body of research, including a major new Yale University study published this month, shows that's not the full story. Nearly 45% of adults 65 and older actually improved in cognitive abilities, physical function or both over more than a decade — and what they had in common was surprisingly simple: a positive attitude toward getting older.

The study, published in the journal Geriatrics, drew on data from more than 11,000 participants in the long-running Health and Retirement Study, a federally supported project by the University of Michigan and the National Institute on Aging. Researchers tracked changes in cognition through standard tests and physical function via walking speed, a reliable marker of overall fitness and mobility.

Over an average follow-up of about eight years — and up to 12 years for some — 32% showed cognitive gains, 28% improved physically, and many advanced in both areas. When researchers averaged the group, the typical pattern of slight decline appeared. But individual trajectories told a different tale: Improvement wasn't rare or reserved for genetic outliers. It was common among those who started with more positive beliefs about aging.

"Individuals who have taken in more positive age beliefs tend to have a lower stress response and lower stress biomarkers," said lead author Becca Levy, a professor of epidemiology and psychology at Yale. "Because age beliefs are modifiable, there could be a capacity for improvements later in life."

Positive age beliefs — viewing aging as a time of wisdom, growth and continued capability rather than loss — predicted gains even after accounting for age, sex, education, chronic diseases and depression. Those with upbeat views were significantly more likely to walk faster and score better on memory and thinking tests years later.

The findings add to a wave of research on "super-agers," people in their 80s and 90s whose memories rival those of adults 30 years younger. A February study published in Nature examined brain tissue from super-agers and found they produced roughly twice as many new neurons in the hippocampus — the brain region critical for learning and memory — as typical older adults. Super-agers had 2.5 times more than people with Alzheimer's disease, and in some cases more immature neurons than even younger adults in their 30s and 40s.

Their brains also showed other advantages: a thicker cingulate cortex linked to attention and motivation, fewer tau tangles (a hallmark of Alzheimer's), and more supportive cells nurturing those new neurons. Senior author Orly Lazarov of the University of Illinois Chicago called it a "resilience signature" that keeps the aging brain plastic and capable of growth.

Yet super-agers don't necessarily share elite genetics or identical lifestyles. Studies over 25 years from Northwestern University's SuperAger Program suggest their edge often comes from behavior and outlook, including staying mentally and socially engaged. One analysis found that while diets and exercise routines varied, a common thread was an optimistic, purposeful approach to life.

The Yale research highlights how mindset translates into measurable change. Positive beliefs may reduce stress hormones that harm the brain and body over time. They also encourage behaviors that support health: regular physical activity, social connections, learning new skills and seeking medical care proactively.

"Psychological pathways, behavioral pathways and physiological pathways" all appear to link age beliefs to outcomes, Levy said. For instance, someone who sees aging as a period of continued vitality might be more likely to join a walking group, pick up a new hobby or challenge negative stereotypes that lead to self-fulfilling decline.

This isn't just about rare super-agers. The Yale study involved a broad, nationally representative sample of older Americans, showing improvement is accessible to many. About 45% gained ground in at least one key area, a figure that challenges fatalistic views of aging.

Experts say the implications are practical. Interventions that shift age beliefs — such as public education campaigns, therapy techniques or even simple exercises reframing aging — could help more people thrive later in life.

"Age beliefs are modifiable," Levy noted. Programs teaching older adults to reject stereotypes have already shown promise in improving physical function and memory in shorter-term studies.

Complementing the mindset findings, lifestyle factors play supporting roles. Regular exercise, particularly strength training and aerobic activity, combats muscle loss (sarcopenia) and boosts brain blood flow. A heart-healthy diet rich in vegetables, berries, nuts and fish supports cognitive resilience. Social engagement and lifelong learning keep neural pathways active. Good sleep and stress management further protect against decline.

But the Yale data suggest mindset may act as a multiplier, making people more likely to adopt and stick with those habits.

Critics caution that not everyone starts with equal opportunities. Chronic conditions, socioeconomic barriers and lifelong exposure to negative aging stereotypes can make positive shifts harder. The study adjusted for many of those factors, yet researchers emphasize that societal changes — like reducing ageism in media and workplaces — could amplify individual efforts.

Still, the message is hopeful. At 76, one participant in related research reported feeling sharper and stronger than in her 60s after embracing activity and a growth-oriented view of aging.

Super-ager brain studies reinforce that human brains retain plasticity deep into old age. The Nature paper adds biological evidence: even in the 80s, new neurons can form and integrate, especially in supportive environments fostered by positive outlook and engagement.

As populations age worldwide, these insights could reshape health policy and personal expectations. Rather than focusing solely on preventing loss, experts suggest promoting potential gains.

Levy and colleagues plan further research into how to best cultivate positive age beliefs at scale. In the meantime, the evidence is clear: Aging doesn't have to mean uniform decline. For many, it can include getting stronger, sharper and more capable — especially if they believe it's possible.

The study was funded in part by the National Institute on Aging. Researchers declared no conflicts of interest.