Death to Marathon

My wife ran a marathon two years ago. Her knee got injured and she quit doing any kind of exercise for a long time which resulted in her gaining a lot of weight.

I trained with her but I chickened out at the very end and ran only a half marathon. I was skeptical of doing such a drastic kind of activity; now this guy in Men's Health has started to write about the very bad effects this kind of activities could have on your body:

Death to Marathon
More Death to Marathon
Last Word on The Not-so-Great Race