Study suggests physical activity slows Alzheimer’s disease

DEAR DOCTORS: What do you know about a study that says aerobics might be good for slowing down the progression of Alzheimer’s disease? I've read that being active helps your memory, but how would it affect an actual disease?

- 

DEAR READER: You are referring to a study conducted by researchers in Great Britain that appeared in the journal Brain Research. And you are correct that it investigates the idea that regular physical activity can have a positive effect on the progression of Alzheimer's disease. The study is part of a growing body of research into the role of physical activity in bolstering and preserving cognition. What makes it notable is that the findings offer clues to the question that you have posed, which is what causes the protective effect.