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PEAK BODY. UNBREAKABLE MIND.

Men's Health Oxford Mail Train USN Muscle & Fitness Men's Health Oxford Mail Train USN Muscle & Fitness
A collage of fitness and bodybuilding images. The top image features a group of four muscular men smiling and posing at a fitness event with banners in the background. The middle image shows a man performing a handstand push-up on gym equipment. The bottom left part displays a close-up of a person's well-defined abdominal muscles. The bottom right image shows two men posing in front of a backdrop with the USN logo, one wearing a black shirt and the other in a white shirt.
A muscular shirtless man with tattoos, short light brown hair, and a beard, standing with hands on hips against a black background.
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MEET SAM ROSSITER

Been there, done that, got the injuries: from professional athlete sharing the stage and being team mates with the current Mr Olympia to fixing others and training people how to become trainers themselves. Recovering from horrific injuries and refusing to die over and over again, transforming world class athletes from good to great,

Sam and his partner Jules created AK37fitness to bring together everything learnt about strength, resilience, recovery, and personal change to invite people to come to visit us in paradise to get fit healthy and happy, and go home with a tan.

Today he works with athletes around the world making them stronger mentally so they can become stronger physically.

Sam teaches people how to not quit.

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A man with tattoos on his arms, wearing rings, a watch, and necklaces, sitting at a wooden table with a laptop and a notebook, holding a smartphone.
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A black and white digital drawing of a skull wearing an American football helmet with the initials APE on the front, and a football in the background.

“you can’t win physically if you’re losing mentally.”

Our services

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ACCOUNTABILITY
& TRAINING

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Personalized training for men and women ready to reclaim their strength, confidence, and health. Through customized training, nutrition guidance, accountability, and mindset development, you'll build sustainable habits that create lasting transformation wherever you are in the world.

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INJURY RECOVERY
& PERFORMANCE

Move better. Feel stronger. Perform at your highest level.

Whether you're recovering from injury, rebuilding after setbacks, or striving to reach peak performance, our approach combines mobility, corrective exercise, strength training, and recovery strategies to restore function, eliminate limitations, and help you move with confidence again.

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AK37 DOMINICAN EXPEDITIONS

Spend a week training, recovering, and living alongside the AK37 team in the Dominican Republic.

Train with purpose. Learn how to fuel your body. Recover properly. Wake up to ocean air instead of alarms. Disconnect from the distractions that keep you stuck and reconnect with the version of yourself you've been neglecting.

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AK37 PHILOSOPHY

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At AK37, we believe strength is forged through adversity. Growth doesn't happen in a comfort zone. it happens when you push beyond what you thought you were capable of.

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Like building a house, lasting transformation starts with a solid foundation. First the groundwork, then the structure, then the finishing touches. Whether you're rebuilding your body, your mindset, or your life, our philosophy is simple: the commitment is up to you.

“If you want it bad enough you’ll get it, if you don’t get it, you didn’t want it bad enough.”

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WHO IS THIS FOR

You know what you're capable of— you just need the right system to get back there.

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FORMER & ASPIRING ATHLETES

Business owners, professionals, and leaders who want more energy, resilience, and discipline.

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HIGH PERFORMERS

Recovering from injury, burnout, setbacks, or major life transitions.

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THOSE REBUILDING

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Text-based graphic with the words 'REAL PEOPLE. REAL TRANSFORMATIONS.' in large, bold, distressed font.
Text saying 'The real people. The real transformations.' with a distressed style.
Comparison of the same man before and after body transformation. On the left, he has a leaner, less muscular physique with tattoos on his chest, arms, and torso. On the right, he has a more muscular, defined body, with tattoos still visible, and is wearing blue shorts.
A shirtless man with tattoos poses in front of a bathroom mirror.

BEFORE

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AFTER

(2 Months of Training)

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REAL CLIENTS. REAL CHALLENGES. REAL RESULTS.

Strength isn't built overnight. It's forged through thousands of small decisions made when nobody is watching.

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testimonials

  • A police officer stands in front of the Ontario Provincial Police station, with patrol car parked behind him, wearing a black uniform with police gear, in daytime.

    David Haywood

    POLICE CONSTABLE FIRST CLASS

    "After 23 years in law enforcement, I thought chronic pain was something I'd just have to live with.

    Sam was the first person to identify the real cause of my injury and provide lasting relief. When I later tore my hamstring, his treatment and recovery plan got me back on my feet faster than I thought possible. His knowledge, professionalism, and results speak for themselves."

  • Two muscular people, a man and a woman, lifting dumbbells in a gym or fitness setting, with water or sweat on their bodies, focused on their workout.

    Dave & Jeanette Andrea

    BUSINESS OWNERS

    “Sam is amazing! My wife (57) and myself (65) challenged Sam to whip us in shape over the 3 months of Summer with a planned photo shoot at the end to motivate us. I felt like I was at Gold’s Gym on Venice beach with Arnold himself. Sam is old school when it comes to the foundation of his training process but his knowledge of the human body and how to safely build muscle was enlightening. Sam knew how to push us just enough to challenge ourselves without getting hurt.

    By the end of the Summer, we were in the shape of our lives and I topped it off by reaching my goal of bench pressing 225lbs! We highly recommend his expert services backed by his own personal experience and education of what the human body is capable of doing.”

  • Wesley Wang

    GLOBAL ANIMAL CONSERVATIONIST

    “I’ve known Sam Rossiter for over a decade, both as a close friend and as my go-to for physical therapy, training, and sports massage. What sets Sam apart isn’t just his skill - it’s how much he genuinely cares. He listens, adjusts his approach to what my body actually needs, and takes the time to get it right rather than rushing through a session.

    Beyond the professional side, Sam is one of the most loyal and empathetic people I know. He shows up for the people in his life, and that same care and attention carries directly into his work. I trust him completely, both with my recovery and as a friend.”


YOUR NEXT CHAPTER STARTS NOW.

You don't need another program. You need a challenge worth committing to.

Whether you're rebuilding, recovering, or ready for more, AK37 is here to help you take the next step.

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CONTACT