Exercise may improve thinking skills and thicken areas of the brain in people as young as 20
“Increased thickness of the outer layer of the brain in the left frontal area: > "Since a difference of 0.5 standard deviations is equivalent to 20 years of age-related difference in performance on these tests, the people who exercised were testing as if they were about 10 years younger at age 40 and about 20 years younger at age 60," Stern said.”