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Walking counteracts brain atrophy in older adults

  • Walking 40 minutes a day three days a week prevented ‘normal’ atrophy in the brains of older adults.

Another study has come out proclaiming the cognitive benefits of walking for older adults. Previously sedentary adults aged 55-80 who walked around a track for 40 minutes on three days a week for a year increased the size of their hippocampus, as well as their level of BDNF. Those assigned to a stretching routine showed no such growth. There were 120 participants in the study.

The growth of around 2% contrasts with the average loss of 1.4% hippocampal tissue in the stretching group — an amount of atrophy considered “normal” with age. Although both groups improved their performance on a computerized spatial memory test, the walkers improved more.

The findings are consistent with a number of animal studies showing aerobic exercise increases neurogenesis and BDNF in the hippocampus, and human studies pointing to a lower risk of cognitive decline and dementia in those who walk regularly.

http://www.scientificamerican.com/blog/post.cfm?id=aerobic-exercise-bul… http://newoldage.blogs.nytimes.com/2011/02/01/walking-down-memory-lane/

Reference

Erickson, K. I., Voss, M. W., Prakash, R. S., Basak, C., Szabo, A., Chaddock, L., … Kramer, A. F. Exercise training increases size of hippocampus and improves memory. Proceedings of the National Academy of Sciences. Retrieved from http://www.pnas.org/content/early/2011/01/25/1015950108.abstract

seniors
Exercise
aging
brain atrophy
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hippocampus

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