Does exercise help with Parkinson's disease?
Exercise demonstrably helps with Parkinson's disease: motor symptoms decrease and quality of life improves. Dance and aquatic exercise have the strongest evidence base; flexibility training offers little benefit. Discuss with your healthcare provider which form best suits your situation.
Of all the forms of exercise studied, dance has shown the strongest improvement in motor symptoms: an average of around ten points on the standard Parkinson's motor scale (UPDRS-M), well above the threshold at which a difference is clinically noticeable. This has been rated as moderate- to high-quality evidence.
Aquatic exercise scores best for quality of life: an average improvement of fifteen points on the PDQ-39 quality scale, where an improvement of as few as five points is already noticeable. Endurance training, such as cycling or brisk walking, shows an average improvement of nine points on that same scale. High-intensity aerobic training, three times a week for thirty to forty minutes at 60 to 80 percent of maximum heart rate, appears to be especially effective for motor symptoms, in part because it can stimulate the brain's capacity to adapt.
Almost all forms of exercise help with Parkinson's, but not all of them. Flexibility training is the exception: on average it shows no clinically relevant improvement in motor symptoms. Combined training and strength training appear to be the most broadly effective, including for symptoms beyond movement, such as sleep, mood and cognitive function.
Whether exercise also slows the disease rather than merely relieving its symptoms is an interesting question, but the answer is not yet clear. Indications come mainly from animal studies and indirect data in humans. Definitive evidence in humans is still lacking. There is also little research on people with more advanced disease or with cognitive problems, so whether exercise works equally well for them is unknown.
On safety: most studies describe the interventions as relatively safe. Falls and pain were the most commonly reported problems. However, fewer than half of the studies tracked this systematically, so the true likelihood of side effects is difficult to estimate. Discuss which form of exercise suits you best with your healthcare provider, especially if you fall frequently or already have advanced symptoms.
The evidence is based on a large number of studies in which people were randomly assigned to an exercise group or a control group, together accounting for nearly 8,000 participants with Parkinson's disease. Multiple systematic reviews analysed 154 to 156 such studies. The evidence for dance and aquatic training on the primary outcomes has been rated as moderate to high quality; for endurance training it was rated as low. Safety data are thin: fewer than half of the studies reported anything at all about side effects. Most participants had mild to moderate Parkinson's without cognitive problems, which means the findings may not apply to people with more advanced disease.