Another inspiration that has helped me get through has been Lance Armstrong's story. My cancer is not nearly as bad as his, but I believe in staying motivated and keeping as fit as you can.

I'll never do that again!

When I came to New York in 1978, I was a full-time school teacher and track runner, and determined to retire from competitive running. But winning the New York City Marathon kept me running for another decade.

One day you are happy and laughing and the next you are crying.

Running gives me a clearer perspective on the world, and it makes me feel special. I've never been a traditional tourist. I've always seen the world by running, and that has allowed me to view things in a different way. Places look different in the early-morning hours, when the streets are deserted.

In terms of fitness and battling through cancer, exercise helps you stay strong physically and mentally.

I don't think I would have been such a good runner if I hadn't enjoyed it.