Impact of Exercise on Cognitive Decline in Parkinson’s Disease
Overview of Parkinson’s Disease
A recent study investigated whether exercise programs can mitigate cognitive decline associated with Parkinson’s disease. This brain disorder primarily affects older populations and is characterized by significant motor function impairment. Historically, Parkinson’s was predominantly seen as a motor disease; however, it now includes various non-motor symptoms. One significant non-motor symptom is cognitive impairment, which increases the risk of dementia.
Approximately 50% of Parkinson’s patients experience cognitive decline within the initial years of diagnosis. Clinicians often describe the symptoms of Parkinson’s as an iceberg, where the visible motor symptoms represent the tip, while the less apparent non-motor symptoms lie beneath the surface.
Research Motivation
Given the hidden cognitive deterioration that can lead to dementia, concerns arise among clinicians and caregivers regarding disease progression and its effects on individuals. This concern prompted Brazilian researchers, led by Franciele Cascaes da Silva, to explore whether exercise programs could slow cognitive decline in Parkinson’s patients. The findings were published in the journal PLoS ONE.
Methodology of the Study
The researchers conducted a systematic review of literature from the past decade, focusing on studies that assessed the impact of physical activity on Parkinson’s disease. They sourced data from several databases, including Medline, Cochrane, Scopus, PEDro, and Web of Science. The analysis included nine studies with sample sizes ranging from 17 to 39 participants, predominantly male. The researchers examined participant characteristics, screening tests used to evaluate cognitive abilities, and scored patients across various cognitive domains. The duration of the exercise programs varied from seven to 24 months, with follow-up periods spanning two to three months.
Findings on Exercise and Cognitive Function
The research revealed cognitive improvements among Parkinson’s patients engaging in various forms of exercise, including treadmill training, adaptive tango dancing, stationary bicycle training, Tai Chi, and cognitive training (Wii FitTM) combined with motor activities like stretching and strengthening. These sessions occurred at least two to three times weekly, lasting 40 to 90 minutes each.
The study indicated that the most effective exercise programs were adapted tango, cognitive training paired with motor training, and treadmill training. While all three approaches positively impacted global cognitive function, processing speed, sustained attention, and mental flexibility, treadmill training exhibited the most significant improvements.
Significance of the Research
Research in cognitive enhancement is crucial for developing treatment strategies for degenerative disorders such as Parkinson’s disease. By investigating the effects of exercise on brain health, we can better understand the changes that occur within the brain and seek to reverse the degenerative aspects of Parkinson’s disease in the elderly.
Author Information
Written by Dr. Apollina Sharma, MBBS, GradDip EXMD.
Reference
da Silva, F. C., da Rosa Iop, R., de Oliveira, L. C., Boll, A. M., de Alvarenga, J. G. S., Gutierres Filho, P. J. B., … & da Silva, R. (2018). Effects of physical exercise programs on cognitive function in Parkinson’s disease patients: A systematic review of randomized controlled trials of the last 10 years. PloS one, 13(2), e0193113.