ORLANDO, FL, January 22, 2026 — Want to keep your brain sharp as you age? A year of regular aerobic exercise may be enough to make your brain appear almost a year younger, according to new research. This finding suggests a simple lifestyle change could have a significant impact on cognitive health and overall well-being.
Exercise Rewinds Brain Age, Study Finds
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A consistent aerobic exercise routine may help maintain a biologically younger brain, potentially improving thinking and memory.
- Adults who exercised consistently for a year showed brains that appeared nearly one year younger than those who didn’t change their activity levels.
- Brain age was measured using MRI scans, comparing a person’s brain structure to that of others their age.
- The study, published in the Journal of Sport and Health Science, suggests exercise may protect against cognitive decline.
- Researchers found the benefits of exercise were seen even without significant changes in fitness, blood pressure, or other common health markers.
How old is your brain, really? That’s the question researchers at the AdventHealth Research Institute set out to answer. They discovered that sticking to a regular aerobic exercise routine can help the brain remain biologically younger, potentially supporting clearer thinking, better memory, and overall mental well-being.
Measuring Brain Age with Advanced Imaging
The study, published in the Journal of Sport and Health Science, examined whether regular aerobic exercise could slow or even reverse what scientists call “brain age.” Brain age isn’t about chronological age; it’s estimated using magnetic resonance imaging (MRI) and reflects how old the brain *appears* compared to a person’s actual age. A higher brain-predicted age difference (brain-PAD) indicates the brain looks older, and previous research has linked this measure to weaker physical and cognitive performance and a higher risk of death.
“We found that a simple, guideline-based exercise program can make the brain look measurably younger over just 12 months,” said Dr. Lu Wan, lead author and data scientist at the AdventHealth Research Institute. “Many people worry about how to protect their brain health as they age. Studies like this offer hopeful guidance grounded in everyday habits. These absolute changes were modest, but even a one-year shift in brain age could matter over the course of decades.”
A Year-Long Exercise Trial: The Details
The clinical trial involved 130 healthy adults between the ages of 26 and 58. Participants were randomly assigned to either a moderate-to-vigorous aerobic exercise group or a usual-care control group. Those in the exercise group completed two supervised 60-minute workout sessions each week in a laboratory and added home-based exercise to reach roughly 150 minutes of aerobic activity per week. This schedule aligned with the physical activity guidelines set by the American College of Sports Medicine.
Researchers used MRI scans to measure brain structure and assessed cardiorespiratory fitness through peak oxygen uptake (VO2peak) at the beginning and end of the 12-month study.
Exercise and a Younger-Looking Brain: The Results
After one year, significant differences emerged. Participants who exercised showed a measurable decrease in brain age, while those in the control group showed a slight increase. On average, the exercise group’s brain-PAD dropped by about 0.6 years, meaning their brains looked younger at the study’s conclusion. The control group’s brains appeared about 0.35 years older, a change that wasn’t statistically significant. Directly comparing the two groups revealed a gap of nearly one full year in favor of the exercise group.
“Even though the difference is less than a year, prior studies suggest that each additional ‘year’ of brain age is associated with meaningful differences in later-life health,” said Dr. Kirk I. Erickson, senior author of the study and a neuroscientist and director at AdventHealth Research Institute and the University of Pittsburgh. “From a lifespan perspective, nudging the brain in a younger direction in midlife could be very important.”
Unlocking the Mystery: Why Exercise Works
To understand *how* exercise influenced brain age, the research team examined several factors, including changes in physical fitness, body composition, blood pressure, and levels of brain-derived neurotrophic factor (BDNF), a protein that supports brain plasticity. Surprisingly, none of these factors fully explained the reduction in brain-PAD seen in the trial, despite improvements in fitness levels.
“That was a surprise,” Wan noted. “We expected improvements in fitness or blood pressure to account for the effect, but they didn’t. Exercise may be acting through additional mechanisms we haven’t captured yet, such as subtle changes in brain structure, inflammation, vascular health or other molecular factors.”
The Power of Prevention: Focusing on Midlife
Many studies on exercise and brain health focus on older adults, after age-related changes are already well underway. This trial took a different approach, targeting people in early to mid-adulthood, when brain changes are harder to detect but prevention may offer greater benefits over time.
“Intervening in the 30s, 40s and 50s gives us a head start,” Erickson said. “If we can slow brain aging before major problems appear, we may be able to delay or reduce the risk of later-life cognitive decline and dementia.”
Looking Ahead: What This Means for You
The authors caution that the study involved healthy, relatively well-educated volunteers and that the changes in brain age were modest. They emphasize the need for larger studies and longer follow-up periods to determine whether these reductions in brain-PAD translate to lower risks of stroke, dementia, or other brain-related diseases.
“People often ask, ‘Is there anything I can do now to protect my brain later?’” Erickson said. “Our findings support the idea that following current exercise guidelines — 150 minutes per week of moderate-to-vigorous aerobic activity — may help keep the brain biologically younger, even in midlife.”
