It is now well known that, for rodents, physical exercise is beneficial for brain health. Indeed, mice allowed to freely run on an exercise wheel grow more new neurons that mice not allowed to move freely. Importantly, these new neurons grow in an area crucial for memory formation: the hippocampus.
Neurogenesis (the birth and development of neurons) is difficult to estimate in the human brain as there are no way to directly count new neurons…
Recently, Small and his colleagues (2007) were able to use neuroimaging to study the effect of physical exercise on neurogenesis in humans. Their study involved a group of 11 middle-aged adults who had been exercising about four times a week, for three months. Results show exercise-related changes in the hippocampus, suggesting neurogenesis in this area.
This new study adds to the numerous results showing that physical exercise is good for the brain. Let’s keep moving then!
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