Just a few thousand daily steps might keep Alzheimer’s at bay for years. Credit: Shutterstock Adding even a modest number of steps to your daily routine may help delay the advancement of Alzheimer's disease, especially among those most vulnerable to it, according to new research. In a study published in Nature Medicine , scientists from Mass General Brigham found that greater physical activity was linked to slower cognitive decline in older adults who had higher levels of amyloid-beta, a