Study Finds Connection Between Childhood Cardiorespiratory Fitness and Lower Adult Depression Risk

Research from the University of Tasmania’s Menzies Institute for Medical Research indicates that children with higher cardiorespiratory fitness are less likely to develop depression in adulthood. The study, which spans over 30 years, utilized data from the Childhood Determinants of Adult Health Study (CDAH), examining the fitness of Australian children aged 7-15 in 1985 and reassessing them 36-49 years later.

The findings reveal a consistent link between cardiorespiratory fitness and reduced risk of adult depression, while the relationship with muscular strength was less clear. Interestingly, this association was found to be stronger among females. Globally, around 322 million adults, or one in 20, are affected by depression, with women experiencing depression about 1.5 times more frequently than men.

Professor Grant Tomkinson from Adelaide University emphasized the importance of identifying factors that can be modified to lower the risk of depression. He stated that while it is known that physical activity boosts mental health, the long-term impact of childhood fitness on mental well-being was not well understood until now.

The study included over 1,000 participants, including physical tests like a 1.6-kilometer run for cardiorespiratory assessment and a standing long jump for muscular power. Participants were later evaluated using a World Health Organization diagnostic interview to assess depression incidence.

Dr. Brooklyn Fraser, a co-researcher, noted that the data collected over three decades provided a unique opportunity to explore how early fitness is connected to mental health later in life. The research underscored that cardiorespiratory fitness demonstrates the strongest associations with adult depression risk.

Dr. Kylie Smith, the lead author, highlighted the need for future studies to delve deeper into how childhood fitness impacts mental health. She pointed out that while fitness alone cannot be singled out as the cause of adult depression, it represents a significant aspect of overall health and well-being.

The findings are detailed in the study titled 'The long run: Fitness during childhood and adolescence and its association with adult depression,' published in the Journal of Affective Disorders.