The Alzheimer’s Research Center touts exercise as one of the best weapons against the disease. It appears to protect the hippocampus, which governs memory and spatial navigation, one of the first brain regions to succumb to Alzheimer’s-related damage. A recent study suggests that a daily walk or jog could lower the risk or blunt its impact once it has begun. In 2000, Dutch researchers found that inactive men were 4 times more likely to develop the disease than those who carried the trait but worked out regularly!