As movement is a natural mood enhancer, a link between positive mood and divergent thinking may play a role in these scores. The authors note that negative moods have also been shown to increase creativity as well, so it appears that any movement away from an emotional baseline is useful for creative thinking.
The exact causes as to why walking inspire creativity are still unknown, though this study puts forward a number of potential reasons. Most important, the authors conclude, is that we move. Data might be mixed but anecdotes and test scores are not.
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