Regular walking linked to stronger teen brain regions and better mental health
A study of 5,500 adolescents found that higher daily step counts are associated with fewer mental-health symptoms and slightly thicker brain tissue in areas that regulate emotion.
In a large-scale investigation of 5,500 youths with an average age of 12, scientists tracked physical activity with Fitbit devices over a three-week period and assessed mental health a year later using the child behaviour checklist. The analysis revealed a clear gradient: adolescents taking fewer than 5,000 steps per day exhibited the highest levels of anxiety, low mood and behavioural problems, whereas those averaging about 8,000 steps showed reduced symptoms, and participants reaching 12,000 steps or more reported the fewest mental-health issues.
Brain imaging indicated that the highest-step group had slightly thicker tissue in two regions linked to movement and emotional regulation. The study found no link between step count and school performance. Co-authors Dr Amanda Paluch of the University of Massachusetts Amherst and Dr Divyangana Rakesh of King's College London emphasized that even modest, everyday walking—such as trips to school or the shop—can support adolescent brain health without requiring elite one outlet activity.
Why it matters
The research shows a simple, low-cost activity can improve teen mental health and brain development.
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