6 months of exercise may boost memory in seniors at risk for Alzheimer's

This study looked at whether 6 months of moderate aerobic exercise could improve memory and brain health in older adults (ages 60-80) who are inactive but cognitively healthy. Some participants carried a gene (APOE-ε4) that raises Alzheimer's risk. They were randomly assigned to either moderate exercise or gentle stretching. The goal was to see if exercise could help protect the brain from future decline.