There's no magic to running far or climbing Everest. Endurance is mental strength. It's all about heart.

Life is an adventure that is best lived boldly

My best life lessons and education didn't come from a classroom - they've come from the wild. How you act in the big moments, the ones that challenge you, scare you, tempt you, and force you to make the right decisions, is what defines you.

My faith isn't very churchy, it's a pretty personal, intimate thing and has been a huge source of strength in moments of life and death.

I think viewers quite like it when I'm suffering or eating or drinking something horrible or really up against it in some quicksand or whatever.

Our fate is determined by how far we are prepared to push ourselves to stay alive - the decisions we make to survive. We must do whatever it takes to endure and make it through alive.

Some of the greatest survivors have been women. Look at the courage so many women have shown after surviving earthquakes in the rubble for days on end.