Weekly exercise may do more than keep Parkinson’s patients moving. A new study suggests it could also help protect memory, with people who stayed active showing slower decline in both thinking and motor skills over time.
Researchers at the University of Cincinnati followed 294 adults with mild-to-moderate Parkinson’s disease, with an average age of 66. Participants logged their weekly activity through questionnaires and interviews, which covered everyday movement as well as more intense workouts.
The activity breakdown was broad and practical, ranging from brisk walking and light swimming to chores like vacuuming or mowing the lawn. More vigorous effort included jogging, fast biking, team sports, singles tennis, shoveling, and carrying heavy loads.
Patients were sorted into three groups based on weekly exercise time: up to four hours, four to eight hours, and more than eight hours. That setup gave researchers a way to compare how different activity levels lined up with changes in cognition and movement across several years.
The big takeaway was simple but encouraging. Each extra hour of weekly physical activity was tied to slightly slower declines in memory, thinking, and motor function, even after accounting for age, sex, education, weight, and disease severity.
The middle range seemed to hit a sweet spot. People who exercised four to eight hours per week showed slower drops in memory and thinking than those who did less than four hours, while activity beyond eight hours did not appear to add much more for cognition.
That matters because Parkinson’s is not just a movement disorder. It can gradually erode independence by affecting both the body and the brain, which makes any habit with possible dual benefits worth paying attention to.
Dong-Woo Ryu, M.D., Ph.D., said the findings point to that double payoff. “Parkinson’s disease is a brain disorder that causes movement and cognitive problems that gradually worsen, leading to disability and a loss of independence,” he said in the press release.
Ryu also noted that earlier work had already linked physical activity to better movement symptoms. “Previous research has shown associations between physical activity and movement symptoms. Our study found physical activity may have dual benefits, with associations with slower declines in movement and cognition.”
That kind of message fits what many neurologists already tell patients. Regular movement is not a cure, but it may help support physical fitness, mobility, and brain health in ways that are still being unraveled.
Dr. Vibhash Sharma of UT Southwestern, who was not involved in the study, said the results reinforce the value of staying active. “Exercise has well-established benefits for physical fitness and mobility, along with potential benefits for brain health through mechanisms that are not yet fully understood,” he said.
He also pointed out that the long follow-up is a strength, since the researchers tracked both motor and cognitive outcomes over time. Still, the study was observational, so it cannot prove exercise directly caused the slower decline.
There are also a few caveats. The participants self-reported their activity, which can lead to shaky memory or overestimates, and most were from one location and primarily White, which limits how far the findings can stretch.
Even with those limits, the signal was strong enough to raise eyebrows. The researchers said randomized studies will be needed to confirm whether exercise itself slows disease progression, but the pattern they found is hard to ignore.
That leaves Parkinson’s patients and their care teams with a clear, practical message. Staying active, and sticking with it, may offer more than one kind of payoff, especially when the goal is keeping both movement and memory in better shape for as long as possible.
