Your 82-year-old grandmother was diagnosed with Alzheimer's disease 4 years ago. Your mother is very concerned about the potential of being diagnosed with Alzheimer's disease herself. She has been an avid runner for many years and vigorously exercises at least five times a week for 20 to 30 minutes a day. What would you tell your mother

Basically exercise maintains the integrity of white matter which contains billions of neurons;

Therefore regular exercises reduces Alzheimer's diseases by 50 %. it stimulates the brain's ability to maintain old neuronal connections (synapses), and to make new ones.

Generally, exercise, increases cerebral blood flow, and therefore Oxygen supply to the brain. This stimulates neuronal metabolism.