Can Strength Training and Functional Exercise Keep Your Brain Younger?
We all know exercise is good for the heart and muscles. But what about the brain? A new study published in February 2026 in the journal GeroScience adds to the evidence that strength training combined with functional exercise may help the brain age more slowly.
What did the researchers do?
A team of scientists in Denmark studied 309 healthy adults between the ages of 62 and 70. They were randomly placed into one of three groups for one year:
Heavy training (strength plus functional exercise): three supervised gym sessions each week.
Moderate training (strength plus functional exercise): one supervised session each week, plus two workouts at home.
No exercise (control group): these people kept up their usual activity level.
Because people were assigned by chance, this kind of study (called a randomized controlled trial) is one of the strongest ways to test whether something really works.
Before the program, and again one and two years later, everyone had a brain scan called a resting-state functional MRI. This scan shows how different parts of the brain “talk” to each other while a person is lying still.
What is a “brain clock”?
The researchers used a computer tool called a brain clock. First, they taught it using brain scans from 2,433 other healthy adults, so it learned what brains typically look like at different ages. Then they used it to guess the “brain age” of the people in the exercise study.
If your brain looks a little younger than your actual age, that is a good sign. If it looks older, that may point to faster aging. Think of it as a rough measure of how well the brain is holding up.
What did they find?
Both exercise groups had younger-looking brains.
In the heavy training group, brain age dropped by about 1.4 years after one year, and about 1.85 years at the two-year check.
In the moderate training group, brain age dropped by about 1.4 years after one year, and about 2.3 years at the two-year check.
In the group that did not exercise, there was no meaningful change.
The effect was spread across the whole brain. The change was not limited to one spot, like the movement area. The results suggest a broad, brain-wide pattern, though that is the researchers’ interpretation.
Heavy training also strengthened connections in the front of the brain. This area (the prefrontal cortex) helps with focus, planning, decision-making, and working memory.
The benefits were still there a year after the program ended. That suggests the effects can last.
What this study does not tell us
It is important to be honest about the limits:
A younger “brain age” is not the same as a proven lower risk of dementia. The study measured a scan-based marker, not memory tests or dementia diagnoses.
The participants were healthy older adults from a high-income European setting. We cannot be sure the results apply to people with other health conditions or from other backgrounds.
The brain-age change was modest, about one to two years. Longer studies are needed to see what it means for daily life.
The link to leg strength was small and inconsistent. Getting stronger did not clearly explain the brain changes, so other factors are probably involved.
The bottom line
This study is good news. Even moderate training (strength and functional exercise), with just one supervised session a week plus home workouts, was linked to a younger-looking brain. You do not need to become a bodybuilder to benefit.
The exercise programs in this study mixed strength exercises with functional training, which builds strength, endurance, and balance. Strength moves can include free weights, resistance bands, machines, or body-weight exercises like squats and step-ups. If you are new to exercise, start slowly, focus on good form, and build up over time.
Talk to your doctor first
If you have heart problems, joint pain, balance trouble, or other health concerns, check with your healthcare provider before starting a new exercise routine. They can help you find a safe plan that fits you.
Source: Gonzalez-Gomez R, Demnitz N, Coronel C, Gates AT, Kjaer M, Siebner HR, Boraxbekk C-J, Ibanez AM. Randomized controlled trial of resistance exercise and brain aging clocks. GeroScience. 2026;48:3251-3262. doi:10.1007/s11357-026-02141-x
This post is for general education and is not a substitute for personal medical advice.
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