we believe that
success in sport

Takes A Team

"athletes deserve a gym that's Built For them."

After 15 years working in professional sport, we’ve seen what the right training environment can do for an athlete’s success. We’ve taken these experiences and built a facility for all athletes with the ambition to reach higher and achieve more from sport. Watch the video to learn more about us.

- Karl Goodman, Director & Founder

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success stories


The athletes authority Story

- by karl Goodman, the Founder.

An inside joke amongst the strength and conditioning community is that we’re all failed athletes who live vicariously through the athletes we train. I’m definitely no exception.

By the time I had finished my university degree, I had tried and failed twice at being an athlete. The first was as a baseballer. I was quick to find success, representing NSW by the time I was 12. By the time I was 16, I was burned out, exhausted and without the support network to deal with the pressure. I quit and never looked back. I wish I didn’t.

A few years later, I got into cycling (I know, one of those guys everyone loves to hate). I was good at that too. By the time I was 23, I was racing at the highest standard in Australia. The pressure got to me again. When the going got tough, I couldn’t handle it. I quit, again.

At this point, you’re probably wondering why you’d want to join an athlete development facility where one of the owners had two incredible opportunities to be a professional athlete but didn’t take either of them. I don’t have a good defence.

Lachlan (Left) & Karl (Right). 

The Performance Gym in our Sydney Facility, Artarmon.

I tell my athletes about this all the time. It’s the part of my story that I wish I could rewrite. I wish I knew then, what I know now because I would have found somewhere like Athletes Authority so I didn’t bear the weight of the pressure alone. To make sure my experience isn’t in vain, we’ve created a facility that a lot of people call ‘the institute of sport in private sector’ to help athletes achieve what I wasn’t able to.
It’s a similar story for Lachy. A tonne of talent that never got realised. The difference between Lachy and I is that he was able to transfer his energy into the success of his athletes from an early age.

By the time he was 24, he became the GWS Giants second ever employee. He helped transform a young squad of 18-year-olds into premiership contenders only a few years later. He then got approached by the Parramatta Eels in 2018 to help bring the club back to its proud former glory. It only took him two seasons to bring them back into finals contention (can you tell I’m proud?).

If you would like to hear about our story in more detail, we share the origins of our story on our podcast. You can listen to that below.

Listen to our origin story

Athletes authority on air

Want to hear the full story? Have a listen to our origins episodes, then dig into the rest at your pleasure.

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Why choose us?

See what our athletes have to say
about us

Clint Gutherson

“Love working with Lachie, a coach that values an athlete’s feedback and implements it into their training program. Rare to have a coach with so much knowledge yet always looking to improve. Knowing every athlete was an individual and doing his best to come up with a plan to suit. The best always look to get better.”

Dylan Shiel

“It is rare to be coached by someone who has an abundance of knowledge but also the drive to learn. He listens to the athlete and works with them to get the best out of themselves. I was fortunate to work with Lachie for 5+ years, he is the reason I am the athlete in strength and conditioning I am today.”

Zac Williams

“Working with Lachie at the GWS Giants was a great benefit to myself, as I didn’t know much about strength and conditioning as an 18 year old. He made it simple and clear in what I needed to do over the few years to be able to play AFL at the top level. It was amazing to have a coach take the time and effort to prepare & make me the best player I could be. Lachie has set me up to be the player I am today.”

Meet our experts

We've Been there,
Done that &
we're still doing it


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Le Mottee

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Our resources

Master Your Mental Game Mini-Course | Athletes Authority

Master your mental game Mini Course

Discover the mindset strategies of the World’s Greatest Athletes so you can turn your mind into a weapon of performance.

Athletes Authority | Foot & Ankle Protocol


Bulletproof your weakest links with our body-part specific protection and resilience programs. These 12-week programs target the most common weak links in an athletes body and protects them from re-injury.


Performance = fitness – fatigue. Reduce your fatigue and recover faster with our 3-step recovery system.