Its called "Fit To Live" http://well.blogs.nytimes.com/2008/01/11/when-fitness-means-life-or-death/
This is something that I have been thinking a lot about lately. Probably one of the biggest motivators which finally got me to start really working the McDougall Program to lose weight. It reminds me once of reading an interview with Johnny Depp at some point after 9/11 he said that after the tragedy he was finally inspired to cut back his smoking and start to exercise. He said that he felt it was every parents responsibility to be able to pick their child up and run for a mile if necessary. I'm not usually a doomsday scenario person but for some reason, I agree with him.