So for the new study, which was published this month in Frontiers in Aging Neuroscience, researchers from the University of Illinois in Urbana and other schools decided to look at the effects of several different types of exercise on the wiring and the function of older people’s brain. They began by recruiting 174 healthy people in their 60s and 70s with no signs of cognitive impairment. Most were sedentary, although some occasionally exercised. Then they