Steve Mallia completes Tokyo Marathon, receives Six Star Finisher medal

Steve Mallia "couldn't run 10 metres" when he was 40. Not so many years later, he completed the Boston Marathon. (Supplied: Steve Mallia)

At age the of 40, Steve Mallia weighed 110 kilograms and was told by his doctor that his life would be at risk if he did not improve his health.

Now 54, the Bendigo man has turned his life around by completing all six of the world's major marathons.