Jason Akermanis was branded 'soft' after the AFL legend lasted just one day on SAS Australia, insisting he does not 'have to prove anything to anyone.'

The former Western Bulldogs star and footy hardman joined fellow sporting legends Anthony Mundine, Boyd Cordner, Abbey Holmes, Matthew Mitcham and Peter Bol for the gruelling reality TV show, led by SAS trained officer Anthony Middleton. 

Akermanis was buried in the Jordanian desert for 45 minutes before undertaking a task in which he jumped on and off a moving train.

However, the 46-year-old later complained of an injury to his toes and demanded medical attention at base camp. 

Middleton initially denied Akermanis's request, telling his fellow officers: 'No 3 [Akermanis] has come to [us] saying he has got a foot injury. 

'He sprinted onto the train. Jumped off the train. Sprinted to me and then sprinted off. I didn't see any limping at all. I think No 3 is looking for a way out.;

He then sent for Akermanis, saying: 'Let me have a look. You sprinted fine on the train, jumped off the train.'

The camp doctor agreed with Middleton's assessment, and when asked for the exact cause of the injury, the Bulldogs great was unable to pinpoint when exactly he picked up the injury. 

'Put your boots back on. You won't even try some basic pain relief? You're getting way ahead of yourself,' he said.

Akermanis replied: 'I'm telling you there's nothing we can do if it's going to be that painful. So we either I get a discharge or I have to hand my... I say physically I can't do it.'

The footy great was sent back to his campmates, who were shocked to see him packing his belongings.

Akermanis returned to the yard where he removed his No 3 badge and voluntarily walked away from the process.

'You've gone soft,' said Middleton. 

'I don't need to come on a course like this and prove anything to anyone else,' Akermanis said as he walked away.