A fitness workout has been created in honour of Hannah Clarke as hundreds of athletes from Australia and across the ditch take part to celebrate her life.

Key points: Hannah Clarke was an avid member of the fitness community

Hannah Clarke was an avid member of the fitness community Her tribute workout is being done by CrossFit groups across Australia and New Zealand

Her tribute workout is being done by CrossFit groups across Australia and New Zealand Handstands for Hannah will also be launched next month

The mother of three died in hospital after being set alight by her estranged husband in Brisbane last week.

The 31-year-old's children Aaliyah, 6, Laianah, 4 and Trey, 3 also died in the car on February 19.

A champion trampolinist, Ms Clarke was an avid member of Queensland's fitness community, and had started competing in local CrossFit competitions in both Australia and New Zealand.

Retired Muay Thai champion Daria Smith lives in New Zealand, and said although she never met Ms Clarke, she felt a connection to her as a fellow CrossFit athlete.

"It was going through my mind ever since I first heard about it [Ms Clarke's murder]," Ms Smith said.

"Having young children myself I just cannot imagine the pain this is causing her family.

"Being always surrounded by seemingly strong women in sports, it's a good reminder that no-one is immune to domestic violence and we all should pay closer attention to those around us."

Dozens of gyms in New Zealand and Australia have already completed Hannah's Tribute Workout of the Day (WOD) which involves three rounds to honour Ms Clarke and her children.

The workout incorporates typical high-intensity CrossFit movements.

31 wallballs (9kg — 6kg)

31 wallballs (9kg — 6kg) 19 power cleans (60kg — 40kg)

19 power cleans (60kg — 40kg) two burpee box jump overs

two burpee box jump overs 20 kettle bell swings (24kg —16kg)

CrossFit 0435 in New Zealand is one of several gyms taking part in Hannah's Tribute Workout of the Day. ( Facebook )

New participants join daily and post their efforts on social media, citing the hashtag "hannahstributewod".

Sly Natty from New Zealand ran a fitness competition in 2019, where Ms Clarke competed.

She said the tribute workout was a great way to honour their friend, who was a great ambassador for fitness.

"We are devastated to hear of Hannah and her beautiful children's passing," she said.

"Hannah was a much-loved member of our 'Fittest Mum' family."

Daria Smith said Ms Clarke's death has had an impact on her. ( Facebook )

'We will do her workout every year in memory'

The members of another gym on New Zealand's South Island in Blenheim also completed the workout for Ms Clarke this week.

The gym's Cat Whitaker said emotions are still raw for those who had met Ms Clarke on the competition circuit.

"We have done her WOD and supported each other through. We will do her workout every year in memory of Hannah," Ms Whitaker said.

Donelle DeVorms was part of a group on the Gold Coast who participated in the workout.

She said many of the athletes who competed on the weekend had some connection to Ms Clarke and her family.

"It was really good to be able to share that with other people, it was very quiet … there was lots of hugging," Ms DeVorms said.

"It's hard to understand for a lot of people, why does this happen to such good people?

"[Hannah] was always smiling, happy and really outgoing and bubbly.

"To see someone like that taken so soon, obviously the circumstance is just really horrific."

Handstands for Hannah to be launched next month

Hannah Clarke's friend Caitlin Langford will team up with DV Connect to launch "Handstands for Hannah" next month. ( Supplied: Caitlin Langford )

There has been a public outpouring of grief since Ms Clarke's death.

Mark Yule, who owns a CrossFit gym in Tuggerah, New South Wales, said his members didn't know Ms Clarke personally but were still upset.

"[The tragedy] has certainly mobilised the CrossFit community … when these sorts of things happen, what we see is an outpouring of emotion and certainly a lot of spirit and comradery and everyone comes together," he said.

"I don't know who designed the actual workout to be honest, but once it got out there, there was a hell of a lot of interest in turning up and participating," Mr Yule added.

Ms Clarke's friend Caitlin Langford has teamed up with support service DV Connect to launch another initiative next month called "Handstands for Hannah".

"I felt called to put on a workout with a couple of my CrossFit friends … and I see that there are so many people in the wider community who knew Hannah and her kids and just want to be involved in something," she said.

"Hannah was obviously a CrossFit athlete, so we're running a CrossFit workout, but we've also filmed a workout that can be run in any gym and we've filmed a version that can be done in your park or in your yoga studio or in your Pilates studio."

Ms Langford said the details of the initiative are yet to be finalised but she hopes to make the event on March 7 accessible to everyone and all funds raised will be donated to DV Connect.