Lobes of Steel

"Scientists have suspected for decades that exercise, particularly regular aerobic exercise, can affect the brain. But they could only speculate as to how. Now an expanding body of research shows that exercise can improve the performance of the brain by boosting memory and cognitive processing speed. Exercise can, in fact, create a stronger, faster brain."

Not very long ago, scientists and doctors thought that the number of brain cells a person has after puberty was all they would ever have in their life. Now scientists now that adults produce new brain cells throughout adulthood and into old age, in a process called neurogenesis. The article explains that physical exercise enhances neurogenesis.