A Brazilian research team did a systematic review of randomized controlled trials of the last 10 years to determine the effects of physical exercise programs on cognitive function in Parkinson’s disease (PD) patients, compared with a control group. They concluded that physical exercise programs promote positive and significant effects on global cognitive function, processing speed, sustained attention and mental flexibility in PD patients, at a mild to moderate stage for patients with a 6-year clinical diagnosis of PD. However, treadmill training performed 3 times a week for about 60 minutes and for a period of 24 weeks produced larger improvements in cognition.
PLoS One. 2018 Feb 27;13(2):e0193113. doi: 10.1371/journal.pone.0193113. eCollection 2018.