I'm uncomfortable with the idea of exercise as a treatment for mental illness.
Self medication is part of the problem, and a solitary, pressured thing like marathon training could be more destructive for a depressive than constructive.
I saw one episode last night, and the guy who bailed on it just screamed out as the opposite of what's needed for endurance training.
All that said, I do believe a healthy body supports a healthy mind. I don't think men are designed for inactivity, our inate infraspecies aggression must be exercised or frustration sets in.
I have benefited emotionally from endurance training these past 18 months. My highs and lows are fewer and further between - though not by any means gone - and I think my behaviour and mood are less extreme. What is worse though is my patience, when you're tired from training all the time, you can't be patient as well.
As a runner I am fully aware of the mental health (and physical) benefits of running. So I will watch this with interest. But I always feel there is too much emphasis on marathons when it comes to running. It's like running 10k's or half marathons count for nothing. Our running club has a couch to 5K sessions and they are proving very successful. It is great to see people start out on the their running journeys. But there is too much kudos attached to marathon running, like nothing else is quite as impressive.
+1
It's the guys and gals who become weekly park runners or club runners that have changed their lifestyle, imo.