Eyal, and Robertson report on mentally refreshing breaks. Among other material, they share that “Research shows that nature exposure is restorative for the mind. One study reported better working memory scores after a walk in a natural environment, but not in an urban setting. . . . If you are stuck indoors, research shows that just looking at some photos of nature can help. . . . Every 20 minutes, stare at something 20 feet away for 20 seconds. This type of break is restorative, Gazzaley and Rosen [authors of The Distracted Mind: Ancient Brains in a High-Tech World] explain because it ‘requires blood flow to brain areas that are not related to sustained attention.’”
Nir Eyal and Chelsea Robertson. 2022. “How to Take a Better Break.” Psychology Today, vol. 55, no. 1, pp. 57-58.