Why are Christians fatter than everyone else?

There is an interesting study out by Matthew Feinstein which links obesity and regular religious participation. I couldn't find a link to the study itself, but here's a link to an article with more details.

Feinstein found that American adults who participated in one or more religious group per week were 50% more likely to be obese by middle-age. There are all sorts of questions I have about the study, but let's assume for a few minutes that his conclusions are accurate. What should Christians do about this?

I can think of a few very helpful things.

1. Put an end to the gnostic separation between things spiritual and things physical. Gnosticism is an ancient heresy with many modern forms. Christianity has no place for divisions like that. Christians shouldn't either. And when we get rid of them we'd realize that you cannot be healthy spiritually without taking care of yourself physically. Of course people get sick and that is NOT symptomatic of spiritual decline, but so much of modern unhealth is directly related to poor eating and poor exercise habits.
2. Churches have a huge opportunity to offer classes and support for those wishing to live healthier lives. Do it.
3. Pastors could model a healthy lifestyle. Instead pastors are some of the least healthy people I know. And that includes but is not limited to being obese. My sermon this Sunday will touch on this from my own life.
4. Preach that salvation is not limited to going to heaven when you die and getting wings and a new body. I doubt we carry obesity into heaven with us, but Christianity teaches resurrection, not disembodied cloud hoping. As a result, we really ought to take care of the bodies we have.
5. Offer grace to those who want to change. I believe most people need help and support not a kick in the pants.

I don't know if regular church-goers (and once a week or more would eliminate an awful lot of faithful Christians) are actually more obese than others. It strikes me that this is a worldwide problem and not just a "those who are religious" problem. Perhaps if we churches could get our act together and offer a community that really supported healthy lifestyles, there'd be one more reason for the world to take us seriously when we talk about other things.