The Fleeting Benefits of Marathon Running - WSJ.com

The Fleeting Benefits of Marathon Running - WSJ.com:

"Fitness and dietary experts say marathons increasingly are the exercise equivalent of crash diets, with similarly disappointing results. There's no evidence that running a marathon leads to lasting weight loss, marathon researchers say. And it's unknown how often such runs initiate or perpetuate a lifetime of steady exercise. Indeed, in a long-term fitness sense, marathons are really sprints; the true marathon is the exercise program that lasts for decades, fitness experts say."