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 three 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.