Study Links Physical Activity to Reduced Depression Severity in Genetically Vulnerable Individuals

• •Higher physical activity levels can reduce depressive symptom severity in genetically vulnerable individuals.
• •The study analyzed data from over 23,500 participants using Fitbit and genomic data.
• •No significant interaction was found between genetic risk and physical activity regarding MDD onset.

A study published in Nature Mental Health analyzed data from 23,517 participants to explore the relationship between genetic vulnerability to major depressive disorder (MDD) and physical activity levels. The research utilized whole-genome sequencing and long-term Fitbit data, revealing that higher daily physical activity can lessen the severity of depressive symptoms in those with a genetic predisposition to depression. While a higher polygenic risk score (PRS) was associated with a greater likelihood of MDD diagnosis, it did not directly influence the onset of MDD when physical activity was considered. Instead, the study found that increased physical activity correlated with reduced symptom severity among those with genetic vulnerabilities. The findings suggest a bidirectional relationship, where physical activity may help mitigate severe depressive symptoms, although further research is needed to clarify causation.