Are you the sort of person who can turn around when you have nothing left, and find that little bit extra inside you to keep going, or do you sag and wilt with exhaustion? It is a mental game, and it is hard to tell how people will react until they are squeezed.

Exercise helps my back. If I don't exercise, that's when it starts to hurt. The pain is a good motivator to run and exercise.

The difference between ordinary and extra-ordinary is so often just simply that little word - extra. And for me, I had always grown up with the belief that if someone succeeds it is because they are brilliant or talented or just better than me... and the more of these words I heard the smaller I always felt! But the truth is often very different... and for me to learn that ordinary me can achieve something extra-ordinary by giving that little bit extra, when everyone else gives up, meant the world to me and I really clung to it.

The appeal of the wild for me is its unpredictability. You have to develop an awareness, react fast, be resourceful and come up with a plan and act on it.

The greatest journeys all start with a single step.

If you risk nothing you gain nothing

That feeling when you're so cold you'd give anything to be warm - I've had it before, literally huddled around a candle flame on an ice sheet.