What is known from the cross-sectional and prospective studies regarding the association between (lack of) physical activity and depression?

What are the DSM-IV (now DSM-V) criteria for major depressive disorders (nine symptoms)? How does this approach contrast with the Research Domain Criteria Initiative from the National Institute of Mental Health (NIMH)? What does it mean to say that anxiety and depression are comorbid conditions and why do you think are they so? What is […]