The six teenage boys and girls are benefiting from the knowledge and skills of Thai kick-boxing trainer Justin Fennell, who is leading the weekly sessions at South Whyalla Football Club.

Mission Australia Whyalla service manager Deb Katsiavos said that while the six-week program is developing the participants' self-defence skills, it is also boosting their self-esteem.

"The participants realise they are learning more about this particular form of kick boxing and that it's good for their physical health and well-being," Ms Katsiavos said.

"What they may not recognise is that they are also becoming more confident about their bodies, their ability to pick up new skills and the benefits of working together while they're with Justin, so they gain the maximum benefit from these sessions."

He said the class also meant participants had to understand what was and wasn't okay when it came to confrontation and combat.

"That means they're learning about anger management, bullying, harassment and respecting borders and each other," Ms Katsiavos said.

Anthony Jones, 13, has attended six sessions and said it was great fun and learning a lot.

"I'll definitely be looking to keep it up after the program is finished," Mr Jones said.

Fellow participant Porcia McSeveney, 15, is one of three participants in the girls only sessions.

"I enjoy the fitness and learning to defend myself (and) it's also excellent stress relief," she said.

Mr Fennell said it was clear the groups were benefiting from the experience.

"As the trainer, I've been able to watch as they develop communication between each other and respect for each other's bodies, feelings and levels of expertise - as well as improving their kick-boxing technique," he said.

"They're keen to learn and are very committed."