Black and white image of a single flower, with the petals and stem in white and the background in black.

TRAIN FOR THE PEOPLE WHO RELY ON YOU.

build the body that allows you to perform, regardless of the arena you choose.

see our timetable & Classes

try us for 1 month.
no strings attached

A high standard of functional fitness and movement meets community and homeliness, we’ve been helping the Thornton and Maitland Community feel at home with their fitness for over a decade.

Find out about our 1 month trial
A smiling man with short gray hair and a beard, wearing a black t-shirt and a wristwatch, standing with arms crossed in a gym. In the background, another man is setting up equipment near a wall and window.

YOU’RE THE ONE PEOPLE RELY ON.

Work, the kids, the house, the mate who needs a hand on the weekend. You carry a lot.

And somewhere in there, your own training slipped.

Maybe you've tried before. Signed up, went hard for three weeks, then life got busy and nobody noticed you'd stopped.

Maybe you've never touched a barbell, and walking into a room full of people who know what they're doing is enough to keep you home.

Or maybe your back already lets you know about it after a day in the yard.

Here's the thing. Training on your own is hard, and most people stop when nobody's checking in.

"Before coming to this gym I never pushed myself and was scared to lift weights that felt heavy." Kisch

THE EXCUSES ARE REAL. HERE’S HOW WE BEAT THEM.

"I don't know what I'm doing." You don't have to. Every session is programmed and coached. You walk in, a coach explains the workout and shows you how to do it.

"I'm worried I'll get hurt." Classes are small, so a coach can actually watch your lifts. Lighter weight, a different movement, more time on technique. Every class is adapted to where you're starting.

"Nobody notices when I stop." Here they do. The coaches know your name and the regulars will ask where you were. Training's easier when someone's waiting for you at 5am.

"I can't tell if it's working." We track your lifts and results, so you can see what's moving week to week.

Try us for a month, $95. Grab your spot here.

DON’T TAKE OUR WORD FOR IT.

"Siege has honestly been the best thing I've ever done for myself. The atmosphere there is like no other and it's given me confidence to do things I would have never dreamed of before starting." Laura, nearly 5 years at Siege

"Completely changed my life." John

"Nothing else comes close to Siege." Liam

"The tribe is like a second family." Jill

"I'm 41 and have always felt welcomed." Matt

"It's such a supportive community." Lawrence

"I absolutely love Siege!" Sam

"I've made amazing friends." Laura

Try us for a month, $95. No catch, no lock in.

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A man with a beard and red hair in a gym, holding a barbell with red weights, while another person instructs him. The man wears a black T-shirt with 'MUSCLENATION' printed on it and red shorts. Gym equipment is visible in the background.
A group of people in a gym, with one person lifting a barbell with weights, while others watch and supervise in the background.
People clinking cups and bottles during a gathering or celebration.
Three women using rowing machines at a gym, with a man at a counter in the background. The women are dressed in workout clothes, and the gym has a wooden wall and digital screens.
THE GRAM