Health 24 reports that an analysis of the data from a large cancer study suggests that exercise helps lower the risk of Parkinson's disease: "The researchers looked at exercise levels and tried to determine if they affected the rate of Parkinson's disease after adjusting the numbers to reflect the possible influence of factors such as age, gender and smoking. People who exercised more than 75 percent of their fellow study participants were 20 percent less likely to develop Parkinson's, compared to those who didn't exercise. The risk of the disease was 40 percent lower in those who took part in the highest levels of moderate to vigorous activity, defined as exercise such as jogging, lap swimming, tennis and bicycling, the study found." This sort of analysis is never as robust as the results of a study specifically designed to produce the data you're after, so treat with caution. We already know that exercise is strongly correlated with resistance to most common age-related conditions, however. It's almost as good as calorie restriction! Even if Parkinson's isn't one of these conditions, that's no reason to skimp on keeping up with the health basics.