Personally I like running a lot, but many of my friends do not. I dislike running with other people and generally avoid the runner's fad. I am not sure if my intention is clear, but I wanted to point out that a balance of activities is often (and in my case) what works for a person going through a dark time.
In my case, I can go through a dark period while at the same time exercising regularly. Someone mentioned the need for external stimuli in recovery. I think for some people, running can be overstimulation. I do think for this reason other activities are important—a good example is drumming, which after an hour or two can be a work out. If people want to achieve their goals, there needs to be a large enough pool of possible goals (which, perhaps, there is) that fits personality and physical circumstances.