From the article Get Moving for a Health Brain in the September 2013 AARP Bulletin these quotes:
The latest research shows that cognitive decline is not inevitable…the brain continues to make new neurons and fine tune neural connections as we live…Aerobic exercise jumps-tarts that process and slashes your lifetime risk of Alzheimer’s’ in half and general dementia by 60 %.
Exercise boosts the flow of blood to the brain, spurring the release of what has been dubbed Miracle-Gro for the brain – brain-derived neurotrophic factor (BDNF). This chemical stimulates the formation of new neurons in the hippocampus, the area involved in memory, learning and the ability to plan and make decisions. BDNF also repairs cell damage and strengthens