The submitted article reports one of the first published findings by an epidemiologist showing that moving around a lot protects health, and is not just an outcome of being healthy in the first place. Since his work, there have been many more studies that reach the same conclusion, quite a few of them having been done in Canada as the provinces of Canada developed their health insurance programs.

Lifestyle and environment definitely play into a "cycle of health." If you eat a huge burrito, your stomach will be kept so busy digesting it that you're not going to want to move around for hours afterward. If the air is smoggy, the weather unpleasant, or the streets pedestrian-unfriendly, going outside will be seen as a burden. If your feet and joints hurt when you run(which, as implicated in "Born to Run," is largely a product of our footwear) you will find it difficult to see pleasure in exercise. And so on.

So if you have trouble getting excited about exercise, try to change other lifestyle factors at the same time.

Edit: (This doesn't mean that exercise isn't helpful on its own, just that it may not be the easiest/best "health solution" to start with.)