Seven Year Switch's Jackie has been labelled "irresponsible". And she's furious.

She’s due to give birth to her first baby in a week’s time, but Seven Year Switch‘s Jackie Martin is already having her ability as a mother questioned.

Uploading a shot of her rounded belly in workout gear to her gym’s Instagram account, the soon-to-be mother wrote about finishing her last group fitness class before maternity leave.

“Yesterday I taught my last#GroupFitnessClass for a little while at#39weekspregnant,” the reality TV star told Division X members.

“Could probably keep going next week but the participants are starting to look petrified! And if baby holds off a little longer – I should probably seize the moment to actually have a few days off. Can’t wait to get back into it. 4 weeks? Will that be enough time?? Haha.”

While Jackie says she was making a joke, it seems not everyone was laughing.

Yesterday I taught my last #GroupFitnessClass for a little while at #39weekspregnant. Could probably keep going next week but the participants are starting to look petrified ????????! And if baby holds off a little longer – I should probably seize the moment to actually have a few days off ????. Can’t wait to get back into it. 4 weeks? Will that be enough time?? Haha. #groupfitness

A photo posted by Division Ex (@division_ex) on Aug 18, 2016 at 8:40pm PDT

What followed was an online article comparing Jackie’s post-baby plans to Michelle Bridges’ post-baby routine, which was widely touted as ‘irresponsible’ and ‘concerning’.

But Jackie says she is offended by the imputation she is being negligent as a mother, and has penned a scathing retort to those who doubt her.

“Media that are calling my joke about returning to exercise ‘irresponsible’ are not only offending my job professionalism but me as a mother. And I will not tolerate it,” the 31-year-old fired back on her personal Instagram on Monday night.

“Anyone can say whatever they like about me on a Reality TV show and I couldn’t give a toss.

“There are thousands of nasty comments on the Internet and I couldn’t care less. However DO NOT CRITICISE ME AS AN EXERCISE PROFESSIONAL OR MOTHER.”

Jackie, who decided to stay with long-term partner Tim at the end of the Channel Seven series, says the fact she was joking in her original post was made obvious by the inclusion of emojis, question marks and “haha” at the end.

Media that are calling my joke about returning to exercise ‘irresponsible’ are not only offending my job professionalism but me as a mother. And I will not tolerate it. Anyone can say whatever they like about me on a Reality TV show and I couldn’t give a toss. It’s a fabricated television show and the joke is on you if you believe every bit of it anyway. There are thousands of nasty comments on the Internet and I couldn’t care less. However DO NOT CRITICISE ME AS AN EXERCISE PROFESSIONAL OR MOTHER. I made a joke about returning to teach my Group Fitness Program BoxaBIKE (that I invented – that no media have participated in to my knowledge) as early as 4 weeks after giving birth. There were question marks, monkey faces and a ‘haha’ at the end. So it’s pretty obvious it’s not 100% serious. Firstly I’m not advocating weight-lifting or running – I said BoxaBIKE which has zero impact because you are sitting on a bike. The other 50% of the workout is an upper body workout involving mostly your arms – the upper body component would be perfectly safe after giving birth – the joke is – how long until I’d really want to sit on a bike!? Depending on the labour – quite possibly longer than 4 weeks! And if there are complications it could be months. However, it’s important to understand that I can actually teach this program off the bike by giving direction, so it really comes down to my baby and when it would be ready to be left alone with Tim for an hour, whether I’ve got expressing under control. Not whether or not I’m ready to exercise. Let me be very clear on this next point – I do not give a flying f*** about baby weight, returning to exercise for me has NOTHING to do with my body. It is because I created the Group Fitness Program and I need to teach it to maintain the program’s integrity. I don’t care how long my body takes to ‘bounce back’ if at all and I will proudly wear a bikini on the beach with saggy skin and stretch marks for the rest of my life and own it.

A photo posted by Jackie and Tim (@jackie_and_tim) on Aug 21, 2016 at 11:57pm PDT

“It’s pretty obvious it’s not 100% serious.

“Firstly I’m not advocating weight-lifting or running – I said BoxaBIKE which has zero impact because you are sitting on a bike.”

Returning to work doesn’t necessarily mean strenuous exercise for Jackie, either.

“I can actually teach this program off the bike by giving direction, so it really comes down to my baby and when it would be ready to be left alone with Tim for an hour, whether I’ve got expressing under control. Not whether or not I’m ready to exercise.”

And then, in the most epic fashion, Jackie slam-dunked the haters who say she’ll be returning to work early to lose baby weight.

“Let me be very clear on this next point – I do not give a flying f*** about baby weight, returning to exercise for me has NOTHING to do with my body,” she writes.

“It is because I created the Group Fitness Program and I need to teach it to maintain the program’s integrity. I don’t care how long my body takes to ‘bounce back’ if at all and I will proudly wear a bikini on the beach with saggy skin and stretch marks for the rest of my life and own it.”