The Relationship Between Physical Activity and Well-Being

There is still some concern about the research quality of these intervention studies. So we've talked about more difficult life events like whatever divorce, unemployment, disability so sometimes people are very happy despite trials and amidst all loss and illness and other people are very much affected. We just haven't been able to find these things at least in studies that I think use stronger methodology like longitudinal studies which can actually assess change as people experience events.