Shorten to tackle Heartbreak Hill

He ran his way through an eight-week election campaign and now he's preparing to tackle Heartbreak Hill.

Bill Shorten will take on his first Sydney City2Surf on Sunday.

"I understand that Heartbreak Hill will test me but I think it will be a wonderful day," the federal Labor leader told reporters in Sydney on Friday.

Mr Shorten is looking forward to seeing Sydney on display and joining tens of thousands of people running to raise money for charity.

But he isn't about to quit his day job.

"In terms of my own athleticism, I will make a better prime minister than I will runner."