Fitter Bodies Make for Healthier Brains, Study Finds

By | September 12, 2019

WEDNESDAY, Sept. 11, 2019 (HealthDay News) — If you’re looking for incentives to hit the gym, new research suggests that staying in good shape may help preserve brain structure, boost memory, and improve the ability to think clearly and quickly.

The finding follows an analysis of fitness and brain health among more than 1,200 young adults, average age 30. All underwent brain scans; tests to measure memory, sharpness, judgment and reasoning; and a speed-walking trial to assess cardiovascular fitness. (Muscle strength was not assessed.)

The investigators found that study participants who moved faster and farther over the two-minute walking test performed better on thinking tests than their less-fit peers. Fitter men and women were also found to have healthier nerve fibers across the white matter portion of the brain. White matter is critical for high-quality neural communication, the researchers noted.

Study lead author Dr. Jonathan Repple offered several theories as to what might explain a strong body/strong brain connection.

For one, “exercise decreases inflammation, which then, in turn, is beneficial for brain cells,” said Repple, a psychiatrist and neuroscientist with the University of Muenster, in Germany.

Being fit may also promote better nerve-fiber insulation, and greater growth across nerve cells and nerve connections, he explained.

It may also be that fitter men and women simply have a “better blood supply to the brain,” Repple added.

Dr. David Knopman, a professor of neurology with the Mayo Clinic in Rochester, Minn., seconded that thought.

“It is my opinion that these results reflect a pattern of general improved vascular health in individuals who are more physically fit,” said Knopman. He is a fellow with the American Academy of Neurology and was not part of the study team.

But Knopman said that it is also likely “that physical fitness is a characteristic of people who are more health conscious and practice better health behaviors.” In that case, a constellation of healthy behaviors ultimately might come together to foster better brain health and structure.

For couch potatoes, could a link between body and brain health mean that getting just a bit fitter might be a win-win?

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