Rats that Run Have Better Memory

Male rodents given access to a running wheel early in life show increased neural activity and improved memory as adults.

Written byJef Akst
| 3 min read

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ISTOCK, ALUXUMMale rats with running wheels in their cages from a young age demonstrate improved performance on a memory task as adults, according to a study published today (August 14) in eNeuro.

Specifically, rats that had access to running wheels for six weeks starting at one month of age were better than their more-sedentary counterparts at remembering a box two weeks after they’d been taught to associate it with an electric shock. While the control rats froze—a classic fear response—the same proportion of times regardless of the box type or setting, the running rats froze much more often when placed in the original box.

“This is an animal study, but it indicates that physical activity at a young age is very important—not just for development, but for the whole lifelong trajectory of cognitive development during ageing,” Martin Wojtowicz of the University of Toronto in Canada tells New Scientist. (The caveat that this is an animal study is ...

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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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