Although the moves the children practised might look violent, she said they were choreographed so no one actually got hurt.
"It's more fitness focused and stunt league rather than heavy league stuff because some people think it is not something children should be doing.
"You might be a bit sore from landing on the mat, but there are no injuries."
Mrs Stewart said the activity, held at Mania gym in Sandringham, also focused on entertainment and taught children how to do promotional videos and photos modelled on their favourite WWE characters.
"A lot of it is the kind of look and how you project yourself, especially if you are looking for a long-term career. It teaches them confidence and public speaking."
There were five participants aged between 9 and 13 when the Herald visited yesterday.
Avondale 13-year-old Kieren Nair said his mother, Gina, stumbled across the programme online while looking for local wrestling-related activities for him and his 11-year-old sister,Isabel.
"I have always been a fan of wrestling so I wanted to try it out," he said. "I like the moves and they way that they do it, just the way they do everything and all the characters and the stories."
Isabel said she liked the WWE characters the Bella Twins and liked copying their move the Bella Buster.
"You hold the person on the head and then drop them down," she said.
Mrs Stewart co-owns the wrestling business with Melissa Jones. Together they train and promote athletes for wrestling events, with the hopes of their talent being picked up by WWE.