Physical activity weakens link between genetic risk and depression severity, long-term data suggest
Major depressive disorder (MDD), one type of depression, is one of the most common psychiatric conditions worldwide. It is characterized by persistent low mood and a loss of interest in everyday activities, along with changes in sleep, appetite and motivation.

<p>Major depressive disorder (MDD), one type of depression, is one of the most common psychiatric conditions worldwide. It is characterized by persistent low mood and a loss of interest in everyday activities, along with changes in sleep, appetite and motivation.</p>