Where we walk matters as well. In a study led by Marc Berman of the University of South Carolina, students who ambled through an arboretum improved their performance on a memory test more than students who walked along city streets. A small but growing collection of studies suggests that spending time in green spaces—gardens, parks, forests—can rejuvenate the mental resources that man-made environments deplete. Psychologists have learned that attention is a limited resource that continually drains throughout the day. A crowded intersection—rife with pedestrians, cars, and billboards—bats our attention around. In contrast, walking past a pond in a park allows our mind to drift casually from one sensory experience to another, from wrinkling water to rustling reeds.
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