And then there's the issue of if you become sick or ill and cannot exercise and become depressed.

Heaps of people in my cycle club who had serious accidents (broken hips, legs etc) all said that actually NOT being able to exercise was one of the reasons they became depressed, esepecially if their injury was going to take a long time to heal or possibly mean being unable to ride again. I would like to see strategies to overcome this. Becuase once you at the point in physical health and are doing events etc it's very hard to deal with all your friends part-taking while you cannot. And I don't think doctors know how to deal with it as they say "oh go for a walk" well sorry doc, that doesn't do it for me anymore!