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