Bidirectional Prospective Associations Between Physical Activity and Depressive Symptoms. The TRAILS Study

Purpose Low levels of physical activity (PA) have been shown to be associated with depression in adults. The few studies that focused on adolescents yielded mixed and inconsistent results. Efforts to examine the direction of this relationship have been inconclusive up to now. The aims of this study were therefore to investigate (1) the direction of the inverse association between PA and depressive symptoms over time, and (2) whether these...