Excessive work alters brain structure, research reveals

Working longer hours to complete your to-do list might feel productive, but your brain disagrees. New research shows that those who consistently overwork develop changes in brain structure—and it's not a good sign.

Researchers from South Korea discovered that long work hours can affect areas of the brain essential for planning, organizing, memory, and emotional regulation. The study, published in Occupational & Environmental Medicine, analyzed brain scans of 110 individuals, including healthcare workers. Those working 52 hours or more per week showed notable differences in gray matter compared to colleagues with standard workweeks.

For instance, overworkers had 19% more gray matter in the middle frontal gyrus, a region involved in cognitive functions. While this might sound beneficial, researchers believe it's likely a neuroadaptive response to chronic stress, potentially harming long-term cognitive health and mental well-being.

The findings highlight the need for workplace policies addressing excessive workloads to protect employees' brain health.