New research shows that regular aerobic exercise can help keep the brain biologically younger. Adults who exercised consistently for a year showed brains that looked almost a year younger compared to people who didn't change their habits. The study focused on middle-aged individuals, which represents a critical period when a preventive approach can yield long-term health benefits. Research suggests that even small changes in brain age can accumulate over decades and have a significant impact on health. Physical activity can thus represent a simple and affordable way to slow down the aging of the brain. These findings support the importance of regular exercise as part of a healthy lifestyle, especially in middle age.