Fact checked by Nick Blackmer Your morning run might be pulling double duty for your health. Of course, it’s good for your heart, but it also might protect you from dementia. A groundbreaking study exploring the relationship between exercise and insulin in the brain suggests regular physical exercise can improve brain function,

New research found that working out starts a chain reaction that can lower your risk of dementia. Here's exactly how it works—and how long it takes.

Keeping active throughout life—particularly before the age of 50—leads to changes in the brain that could help stave off dementia, according to a study published in the journal Brain Communications .