Walking to School Linked to Better Teen Mental Health, Study Suggests

Adolescents who walk more daily are less likely to experience poor mental health, a study suggests, with researchers noting that increased physical activity can lead to brain changes related to mood and movement.

The study, which involved over 5,500 adolescents in the United States with an average age of 12, utilized Fitbit devices to track physical activity over three weeks. A year later, researchers assessed the participants' mental health using the Child Behavior Checklist, a questionnaire completed by both young people and their parents to identify symptoms of anxiety, low mood, and behavioral problems.

The findings indicated a correlation between higher daily step counts and fewer mental health problems observed a year later. Teenagers who took fewer than 5,000 steps per day exhibited the most symptoms of poorer mental health. Those averaging around 8,000 steps had fewer symptoms, while individuals reaching 12,000 or more steps reported the fewest.

Furthermore, adolescents with the highest step counts displayed slightly thicker brain tissue in two specific regions associated with movement and emotion regulation. The study did not identify any link between step count and academic performance.

Researchers concluded that higher daily step counts were associated with structural brain differences, which in turn were linked to improved mental health outcomes over time. The beneficial effects on mental health appeared to increase continuously across the observed range, without a discernible threshold or plateau, emphasizing the importance of every step.

This research was a collaboration between King's College London's Institute of Psychiatry, Psychology and Neuroscience, and the University of Massachusetts Amherst. Dr. Divyangana Rakesh from King's College London highlighted that the study provides robust evidence connecting accessible measures of physical activity, such as daily step count, to the development of adolescent brains and mental health. She noted that the benefits did not appear to level off even among the most active participants in the study.

Dr. Amanda Paluch, an associate professor of kinesiology at the University of Massachusetts Amherst, commented on the significance of these findings during adolescence, a critical period for brain and mental health development. She stated that even incremental increases in daily steps, such as 1,000 to 2,000 additional steps from any starting point, were associated with better brain structure and mental health outcomes, with benefits continuing to accrue. Paluch suggested focusing on realistic and sustainable ways for adolescents to increase their daily movement, such as walking to school, engaging in active play, or participating in enjoyable activities.