Vassos Alexander presents an insight into what makes an Ironman triathlete, what it takes to finish and why more and more people are doing it.

Vassos Alexander presents an insight into what makes an Ironman triathlon, what it takes to finish and why more and more people are doing it.

From first timers to amputees, multiple finishers to World Champions, we take a closer look at how the sport redefines what the human body is capable of. Including interviews with world record holder Chrissie Wellington, Scottish pro Catriona Morrison and six time World Champion Dave Scott will speak to us from Hawaii ahead of this year's World Championship.