Arabella Del Busso works out with Rebel Wilson’s PT Jono Castano

Former NRL WAG Arabella Del Busso works up a sweat with Rebel Wilson’s personal trainer Jono Castano… after failing to make it through week one on SAS Australia

She didn’t manage to make it through the first week of Channel Seven’s gruelling show, SAS Australia.

But former NRL WAG Arabella Del Busso certainly looked fighting fit on Thursday, as she trained with Rebel Wilson’s hunky personal trainer, Jono Castano.

And the sweat-inducing routine was clearly hard for the lingerie model, as the 30-year-old shared a video of herself pretending to punch her phone screen with the caption: ‘OK you win this round… Jono 1 – Bella 0.’

Losing battle: 'OK you win this round... Jono 1 - Bella 0,' she joked after the punishing workout

Fighting fit! Arabella Del Busso trained with Rebel Wilson’s hunky personal trainer Jono Castano on Thursday, and shared a video of herself pretending to punch her phone screen to mark the occasion

Jono also shared a video of the model training her legs on a stepping machine, which he captioned: ‘Good to have Arabella in from Melbourne!’ to which she responded: ‘Working those hot dog legs!’

Jono has become very well-known in the fitness circuit, due to him helping Rebel, 40, lose over 20kg over the last 10 months.

Meanwhile, Arabella is no stranger to making headlines after her high-profile split from NRL star Josh Reynolds.

Support: Jono also shared a video of the model training her legs on a stepping machine, which he captioned: 'Good to have Arabella in from Melbourne!'

Support: Jono also shared a video of the model training her legs on a stepping machine, which he captioned: ‘Good to have Arabella in from Melbourne!’

She discussed this during an emotional interrogation on SAS Australia with the show’s no-nonsense DS (directing staff).

As tears streamed down her cheeks, Arabella spoke about her relationship with the rugby league footballer and the ‘scrutiny’ she’s faced since their split late last year.

After meeting Josh, 31, on Instagram in December 2018, Arabella enjoyed a one-night-stand with the sports star before claiming she was pregnant with twins.

A-List clients: Jono Castano (left) helped Rebel Wilson (right) lose 20kg during her 'year of health', and now he's revealed his top tips for keeping the holiday kilos off

A-List clients: Jono Castano (left) helped Rebel Wilson (right) lose 20kg during her ‘year of health’, and now he’s revealed his top tips for keeping the holiday kilos off

Scandal: Before her appearance on SAS Australia, Arabella was best known for faking multiple pregnancies during her ill-fated relationship with NRL star Josh Reynolds (pictured)

Scandal: Before her appearance on SAS Australia, Arabella was best known for faking multiple pregnancies during her ill-fated relationship with NRL star Josh Reynolds (pictured)

She later told him she’d miscarried, before claiming she was pregnant again in March 2019, only to miscarry again.

Arabella claimed to have been pregnant once again in June, sending her then-beau a series of 12-week scans.

‘I told my partner that I had a pregnancy scare, and I showed it to him and said it was ours, when in fact, it wasn’t our scan at all,’ she confessed.

Tell-all: As tears streamed down her cheeks, Arabella spoke about her relationship with the rugby league footballer and the 'scrutiny' she's faced since their split late last year during an interrogation on SAS Australia

Tell-all: As tears streamed down her cheeks, Arabella spoke about her relationship with the rugby league footballer and the ‘scrutiny’ she’s faced since their split late last year during an interrogation on SAS Australia

The DS asked her what prompted her to lie about the pregnancy, and Arabella admitted the relationship was ‘coming to an end’.

‘I didn’t know how to deal with losing someone…’ she continued.

After being asked if her plan was to ‘cheat the person into staying with you’, Arabella said she just wanted ‘to try and draw him back in’. 

Bizarre: 'I have told a lie, but the way that I see it, a little white lie here or there is not going to hurt anyone,' she later admitted

Bizarre: ‘I have told a lie, but the way that I see it, a little white lie here or there is not going to hurt anyone,’ she later admitted