Aerobic exercise is known to benefit the heart, but researchers say that an aerobic workout may also build brain.
Regular aerobic exercise such as walking may protect the memory center in the brain, while stretching exercise may cause the center - called the hippocampus to shrink, researchers reported.
In a randomized study involving men and women in their mid-60s, walking three times a week for a year led to increases in the volume of the hippocampus, which plays an important role in memory, according to Dr. Arthur Kramer, of the University of Illinois Urbana-Champaign in Urbana, Ill., and colleagues.
