Probing Exercise’s Effects on Cognitive Function

Researchers at the Society for Neuroscience discuss what we know—and don’t—about how physical activity affects the brain.

Written byJef Akst
| 3 min read

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Exercise doesn’t just benefit the body, it also benefits the mind. But how it does so, and why individual responses to physical activity often vary, remain mysteries.

“What are the factors that contribute [to individual variability]?” Kirk Erickson of the University of Pittsburgh asked during a symposium this week (November 13) at the annual Society for Neuroscience (SfN) conference ongoing in San Diego, California. “Are they just genetically lucky or have they done something to impact their brain volume and brain health?”

Erickson and fellow panelists ran through years of research demonstrating the cognitive benefits of physical activity. In general, more physically fit older adults tend to have enlarged brain regions, such as the hippocampus, and outperform less-fit peers on a variety of cognitive tasks.

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  • Jef (an unusual nickname for Jennifer) got her master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses. After four years of diving off the Gulf Coast of Tampa and performing behavioral experiments at the Tennessee Aquarium in Chattanooga, she left research to pursue a career in science writing. As The Scientist's managing editor, Jef edited features and oversaw the production of the TS Digest and quarterly print magazine. In 2022, her feature on uterus transplantation earned first place in the trade category of the Awards for Excellence in Health Care Journalism. She is a member of the National Association of Science Writers.

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