James was the 'fat kid' in school. This led to body image issues and steroid use in his 20s

In his 20s, James Smith was on an extreme diet and exercise regime and started using steroids in order to achieve the 'ideal male physique'.  (ABC News: Geoff Kemp)

James Smith is a supremely fit personal trainer, but struggled with body issues throughout his 20s. 

"I was going through a phase of my life where training became the most important thing to me," he says.