I once knew a guy who thought he could eat as much junk food as he wanted as long as he made up for it with "super-foods" (moringa MLM scam actually). Regular workouts don't decrease death risk if you're also a couch potato -- http://www.nbcnews.com/id/38385104/ns/health-fitness/ People who sit for most of the day are 54 percent more likely to die of heart attacks -- http://health.yahoo.net/experts/menshealth/most-da…
"When combined with a lack of physical activity, the association was even stronger. Women and men who both sat more and were less physically active were 94 percent and 48 percent more likely to die during the study period"
Compared to 37% and 18% when they did workout.
I would call that a pretty significant improvement, and a stupid conclusion. Did you read the article?