A new Pew Survey has found that people who are active religiously are happier, though not necessarily slimmer. A link to the full article is included.
"The association between religion and happiness, however, is clear-cut: In every country studied, people who are active in religious congregations tend to be happier than those who attend infrequently or not at all.
The study, “Religion’s Relationship to Happiness, Civic Engagement and Health,” builds on a growing mountain of literature linking religion and health. That literature has mostly found that religions seem to contribute to overall health, though there are obvious exceptions.
Perhaps most notably, religious participation does not appear to encourage weight loss or regular exercise."