Robust evidence
In an accompanying editorial, Lana M. Chahine, MD, associate professor in the department of neurology at the University of Pittsburgh, and Sirwan K. L. Darweesh, MD, PhD, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Center of Expertise for Parkinson and Movement Disorders, Nijmegen, the Netherlands, said the study “provides robust evidence” that physical activity reduces risk for PD in women.
“These results show that the field is moving in the right direction and provide a clear rationale for exercise trials to prevent or delay the onset of manifest PD in at-risk individuals” they wrote.
The study highlights “gaps” in knowledge that merit closer attention and that “further insight is warranted on how much the effects on PD vary by type, intensity, frequency, and duration of physical activity,” the editorialists noted.
Another gap is how the accuracy of assessment of physical activity can be improved beyond self-report. “Wearable sensor technology now offers the potential to assess physical activity remotely and objectively in prevention trials,” they added.
Other areas that need exploring relate to mechanisms by which physical activity reduces PD risk, and to what extent effects of physical activity vary between individuals, Dr. Chahine and Dr. Darweesh noted.
Commenting for this article, Michael S. Okun, MD, executive director of the Fixel Institute for Neurological Diseases at University of Florida Health, and medical adviser for the Parkinson’s Foundation, said the findings are “significant and important.”
Based on only a handful of previous studies, it was assumed that physical activity was associated with reduced Parkinson’s diagnosis only in men, said Dr. Okun. “The current dataset was larger and included longer-term outcomes, and it informs the field that exercise may be important for reducing the risk of Parkinson’s disease in men as well as in women.”
The investigators, the editorialists, and Dr. Okun reported no relevant financial relationships.
A version of this article originally appeared on Medscape.com.