Manu Roberts

Managing Director

 

With eight years in the industry, I’ve learned that fitness isn’t about quick fixes—it’s about building results that last. There’s no one-size-fits-all approach, and I take pride in creating strategies that meet each person where they’re at.

I’ve worked with bodybuilders, professional athletes, older adults, beginners, and injury rehab clients, always focusing on delivering high-quality coaching that makes a real impact. But my passion goes beyond training—I built One Life to raise coaching standards, grow a team of dedicated trainers, and create a space where people don’t just build muscles, but also friendships and real connections.

At One Life, we’re not just here to train—we’re here to lead, support, and build a community that lasts.

You’ll find Manu leading the Coach Development & Education, leading Pursuit Personal Training sessions and Better Together Classes.

Isaac Ratcliff

Head Coach

 

Jasmin Dunlop

Senior Coach

 

Darcee McKenzie

Junior Coach

 

“Health and fitness has been a very large part of my life for the past three years. I was picked on quite a lot for my weight in high school, which affected my self-esteem quite a lot. Since beginning my fitness journey at 17, I have become much more confident, much happier, and my self-esteem is miles ahead of where it was back then. This is why I decided to work in the industry; to help people of all shapes and sizes enjoy their lives to the fullest.”

You’ll find Isaac on the gym floor coaching one-on-one personal training, leading Pursuit personal training sessions, or bringing his electric energy to a Better Together class.

 

With four years in the fitness industry, ‘Jas’ brings a wealth of coaching experience across calisthenics, mobility & movement, pre/post-natal training, strength, and body composition. If you haven’t met Jas yet, you’re in for a treat—she has a way of making training enjoyable, even on the toughest days.

Jasmin embodies what a balanced, healthy approach to fitness should look like. Her ability to support and challenge members while keeping training fun makes her an invaluable part of our team.

You’ll find Jas leading most mid morning Better Together Classes

 

Darcee is a long term member of One Life, she has been coached by Manu & Isaac for several years over many different disciplines. She has joined the coaching team in late 2024. Darcee has first hand experience on how it feels to be coached at a high standard and is highly motivated to share that experience with our members.

You’ll find Darcee coaching Private PT sessions, Better Together & Pursuit sessions throughout the week.

 

Tia has been in the fitness industry for approximately four years, working with a diverse range of clients, particularly in the realm of female body composition. She has helped clients achieve significant fat loss transformations and prepare for body sculpting competitions. Beyond aesthetics, Tia is deeply passionate about all aspects of fitness, focusing on overall well-being and empowering people to feel strong, confident, and capable in their bodies.

Tia also has an impressive track record in her own training, competing in powerlifting competitions and HYROX events, as well as mastering calisthenics—handstands and all the fun stuff included. Her dedication to pushing her own limits translates into her coaching, inspiring others to challenge themselves and achieve their fitness goals in a way that’s both effective and enjoyable.

You’ll find Tia coaching Private PT sessions, Better Together & Pursuit sessions between 5am-12pm most days.