As far back as the Greeks and Romans, humans have documented the belief that there is a strong link between exercise and intelligence. But in the last two decades, neuroscience has begun to catch up with Thales and Juvenal’s idea that a sound mind flourishes in a healthy body. While the studies unite in telling us that running will makes us smarter, it is only partly true.
The process is more complicated and reveals more about the wonderful complexities of both the human body and its evolution. Although the science might be helping us to understand how the mechanisms work, an important question remains: why does running make us smarter?
Two studies, one published by Finnish researchers in February and the other in Cell Metabolism in June, have expanded our understanding of the mechanisms involved in running and the ways that it enhances memory and cognition. Before these, it was understood that exercise-induced a process called neurogenesis (where new brain cells are created) in a part of the brain involved in memory formation and spatial navigation, known as the hippocampus.
While intense exercise will create brain cells, they basically stem cells waiting to be put to use. Exercise doesn’t create new knowledge; rather, it gives you the mental equivalent of a sharpened pencil and clean sheet of paper. It prepares you for learning, but you have to actively do some learning yourself, too. Integrating exercise into your working or studying day would seem like a sensible option, if this particular benefit is of interest to you.
What the new research tells us is that it is not just any exercise that will create new brain cells for you. In the study by Finnish researchers, they discovered that only certain kinds of exercise are likely to result in the growth of new brain cells in adults.
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