Sedentary behavior raises dementia risk as much as genetic f
One of the biggest risk factors for Alzheimer's disease is the apolipoprotein E (APOE) e4 gene. According to the Alzheimer's Association, adults who possess one copy of the APOE e4 gene are three times more likely to develop the disease than those without the gene, while those with two copies are 8-12 times more likely to develop Alzheimer's.

However, the researchers of the new study - including Jennifer Heisz, an assistant professor in the Department of Kinesiology at McMaster University in Canada - suggest that the risk of dementia may be just as high for older adults exhibiting sedentary behavior...