walking may protect the memory center in the brain, while stretching exercise may cause the center — called the hippocampus — to shrink, researchers reported.On the other hand, control participants who took stretching classes saw drops in the volume of the hippocampus, Kramer and colleagues reported online in the Proceedings of the National Academy of Sciences.
The findings suggest that it’s possible to overcome the age-related decline in hippocampal volume with only moderate exercise, Kramer told MedPage Today, leading to better fitness and perhaps to better spatial memory. “I don’t see a down side to it,” he said.
The volume of the hippocampus is known to fall with age by between 1 percent and 2 percent a year, the researchers noted, leading to impaired memory and increased risk for dementia.
But animal research suggests that exercise reduces the loss of volume and preserves memory, they added.
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