Anything she can do! Rob Kardashian hits the gym in bid to lose pounds as on-off fiancée Blac Chyna shares impressive weight loss

His ex Blac Chyna flaunted her post-pregnancy weight loss with a sexy photo shoot this week.

And it looks like Rob Kardashian's been on a bit of an exercise kick too, with a jog on Monday and a trip to the gym on Wednesday.

The father-of-one posted an Instagram photo of a long G-Series mat lined with various forms of workout equipment, beneath a ceiling covered in framed sports jerseys.

'Got it in': Rob Kardashian hit the gym on Wednesday, the same day ex Blac Chyna revealed her impressive weight loss 

'Got it in': Rob Kardashian hit the gym on Wednesday, the same day ex Blac Chyna revealed her impressive weight loss 

Health kick: Earlier on Wednesday, the plump only son of Kris Jenner seemed to show a commitment to fitness, uploading an Instagram photo of his Pressed juice

Health kick: Earlier on Wednesday, the plump only son of Kris Jenner seemed to show a commitment to fitness, uploading an Instagram photo of his Pressed juice

Rob uploaded his gym photo with the caption: 'Got it in with @gunnarfitness' tagging Gunnar Peterson, a favorite personal trainer of his sisters Kim and Khloe as well as stars like Sofia Vergara and Sylvester Stallone.

Earlier on Wednesday, the only son of Kris Jenner seemed to show a commitment to fitness, uploading an Instagram photo of his Pressed juice.

He was standing by a swimming pool, holding the bottle before the camera for a picture with a caption that crowed it was 'Green juice time'.

Heavy: Rob, pictured with fiancee Blac  in January, gained weight after shedding some pounds in 2016

Heavy: Rob, pictured with fiancee Blac Chyna in January, gained weight after shedding some pounds in 2016 with help from Blac

Proud of her progress: Blac Chyna, who'd delivered Rob's daughter Dream in November, uploaded an Instagram photo showcasing her trimmed-down post-baby body on Wednesday

Proud of her progress: Blac Chyna, who'd delivered Rob's daughter Dream in November, uploaded an Instagram photo showcasing her trimmed-down post-baby body on Wednesday

Meanwhile Blac, 28, who delivered Rob's daughter Dream in November, uploaded an Instagram picture showcasing her trimmed-down post-baby body the same day.

In Chyna's photo, her hair was gathered into a massive bun, and she wore nothing but black panties and a black turtlenecked crop top

After his Instagram update regarding his gym trip, Rob uploaded a trio of photos of his daughter, the first showing her in a pink baby dress.

'Dreeeeezy': After his Instagram update regarding his gym trip, Rob uploaded a trio of photos of his daughter, the first showing her in a pink baby dress

'Dreeeeezy': After his Instagram update regarding his gym trip, Rob uploaded a trio of photos of his daughter, the first showing her in a pink baby dress

'Inspiration'/'Motivation': The next two photos showed the laughing three-month-old wearing a pink bib that read: 'PRINCESS HAPPY' over an embroidered image of an owl
'Inspiration'/'Motivation': The next two photos showed the laughing three-month-old wearing a pink bib that read: 'PRINCESS HAPPY' over an embroidered image of an owl

'Inspiration'/'Motivation': The next two photos showed the laughing three-month-old wearing a pink bib that read: 'PRINCESS HAPPY' over an embroidered image of an owl

'Dreeeeezy,' he captioned, following up the text with an emoji of a smiling face that'd got a halo encircling it about its forehead.

The next two photos showed the laughing three-month-old wearing a pink bib that read: 'PRINCESS HAPPY' over an embroidered image of an owl.

'This is my inspiration,' her father captioned the first photo, and the follow-up came with a similar message: 'This is my motivation.' 

A place in the sun: Monday saw an Instagram photo of a gorgeous  landscape view, taken during what Rob referred to in his caption as 'hike time'

A place in the sun: Monday saw an Instagram photo of a gorgeous landscape view, taken during what Rob referred to in his caption as 'hike time'

There are contradicting reports this week about whether Rob and exotic-dancer-turned-reality-star Chyna, who'd got engaged last April, are still together.

The Rob & Chyna co-stars briefly and dramatically split in December, with Rob uploading a Snapchat video in which he bewailed the breakup in their vacant house. 

Though the duo rejoined shortly thereafter, People was claiming by last month that the E! reality stars had broken their engagement.

However, E! News quoted a source Wednesday who said they've been 'working on staying together and focusing on Dream.'

Apparently, 'The main reason why the Kardashian family is so involved with Dream is Kris, who has worked hard to focus Rob on being present for his daughter.'

Said the source: 'Kris has been super focused on being the rock, and she's building a bridge between Chyna and the rest of family.'

On or off?: There have been rumors recently about whether Rob and exotic-dancer-turned-reality-star Chyna, who'd got engaged last April, are still together

On or off?: There have been rumors recently about whether Rob and exotic-dancer-turned-reality-star Chyna, who'd got engaged last April, are still together

Rob & Chyna, which concluded its first season last October and has been picked up for a second, remains in production as well, despite trouble between the couple.

An E! spokesperson said: 'We are continuing to shoot with all the family members, and are covering Rob and his relationship with Chyna.'

Us Weekly however had a more pessimistic outlook on the situation with sources claiming filming on Rob & Chyna has stalled.

Per one source: 'It was hard for them to film season one, and season two is not happening. They can’t even get through a day together - logistically they can’t do it.'

That source went on to dish that 'They coparent Dream, but they don’t spend time together with Dream,' and another source said: 'They are definitely not living together.' 

The stories: Though E! News quoted a source Wednesday saying they've been 'working on staying together,' Us Weekly cited a source the same day said that 'They coparent Dream, but they don't spend time together with Dream'

The stories: Though E! News quoted a source Wednesday saying they've been 'working on staying together,' Us Weekly cited a source the same day said that 'They coparent Dream, but they don't spend time together with Dream'

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