Parkinson's patients who stay physically active may see slower declines in memory and movement. A study published October 7 in *Neurology* found that greater weekly physical activity was associated with slower cognitive decline and slower worsening of movement symptoms — and household chores like washing windows, vacuuming, and mowing the lawn counted as qualifying exercise.
Led by Dong-Woo Ryu, MD, PhD, of the University of Cincinnati, the study followed 294 people with mild-to-moderate Parkinson's disease, average age 66, for up to seven years. Participants reported weekly physical activity hours at work, at home, and during hobbies or recreation, and were divided into three groups: up to four hours, four to eight hours, and more than eight hours per week. After adjusting for age, sex, education, weight, and disease severity, each additional hour of weekly activity was linked to slightly slower declines in memory, thinking, and movement abilities over time.
The medium-activity group — four to eight hours a week — showed slower declines in memory and thinking than the under-four-hour group. But above eight hours, the extra cognitive benefit disappeared. The researchers' reading: how long and how consistently patients stay active may matter more than any single bout's intensity. Moderate activity included brisk walking, light swimming, doubles tennis, and housework such as washing windows, vacuuming, or mowing the lawn; vigorous activity included jogging, fast bicycling, team sports, and singles tennis.
Earlier research had mostly tied activity to movement symptoms. This study's distinction is documenting the cognitive payoff alongside it. "Our study found physical activity may have dual benefits, with associations with slower declines in movement and cognition," Ryu said. The study is explicit, however, that it shows association, not causation.
Ryu urged caution: participants generally had good thinking and memory at the start, so the findings need replication, and the differences between activity levels were small — "these differences may become more meaningful over time." In other words, this is not proof that exercise treats Parkinson's, but regular movement is a low-cost, side-effect-free option for patients and families.
Current clinical guidance for Parkinson's tends to say "stay active" without numbers. If this association holds up in further prospective studies, a target like four-plus hours a week could become a formal exercise prescription. The team's next question is which type of exercise — aerobic, strength, balance — helps which symptoms most, paving the way for personalized activity plans by disease stage.