On a serious note, and taking slight isssue with that comment U.M., it DID in fact seem to help that woman who recently died.....can't think of her name now...who had terminal cancer, and was only given months to live. She embarked on a 'stuff you cancer' campaign for several years, running marathons and other crazy stuff.
Name please anyone?
A truly gritty determined woman if ever there was one. 
The likelihood is that she would have survived the cancer for the same length of time whether she stayed home and bemoaned her lot or cycled up Everest.
How can you, or anyone else for that matter, say that with confidence and belief?
It's impossible to run a comparison on someone who cannot possibly be running in two different states of mind all the time.
My theory anyway is to try and think positive on this particular matter. Nowt to lose, and it MIGHT just help.
