From a farm in George, South Africa to starring for Munster and Ireland - CJ Stander's career is a testament to hard work and determination. He chats to Marie Crowe about dealing with rejection, bouncing back from injury, how his mother made sure he never backed down from a challenge and the right and wrong way to gain 10kg in weight.

In the first episode of a new series, Marie Crowe chats to Sonia O'Sullivan about her development as an athlete, how she became one of the best middle distance runners in the world and how she coped with setbacks.

How do sportspeople develop into elite athletes? Each week RTÉ Sport’s Marie Crowe speaks to a sporting icon, tracing their journey from childhood in the hope of finding out how they became heroes.