personal training and online fitness coaching
in-person services based in sarnia, ontario | serving clients online across ontario

Nestled in the heart of Sarnia, ON, Silverback Fitness is more than just a personal trainer - it’s a community where dedication meets motivation, and where every workout is a step toward a stronger, more vibrant you.

Whether you're a busy professional, a striving athlete, or you’re ready to rock your fitness goals after forty,
we’ve got a plan for you.

We understand that fitness is a full-circle journey—it’s about strengthening your body and your mind. Our approach is built on a foundation of personalized programming, whether one-on-one or in a group setting, tailored to your unique needs and goals. We focus on cultivating a mindset of perseverance and resilience and on enhancing your clarity, strength, and nutritional habits to improve not just your physical health, but also reaching peak performance, longevity, and productivity.

Where Personal Training Goes Beyond Physical Transformation

the silverback philosophy

Forget the one-size-fits-all programs. Your fitness path at Silverback Fitness is as unique as you are. Based on the goals we set together and through ongoing assessments, we navigate every step of your fitness journey together. Our personalized approach ensures that whether your goals are athletic or simply about improving your day-to-day life, we are moving at your pace, with your objectives in mind.

tailored programs to meet your unique needs

the silverback approach

discover our programs

Turning forty doesn’t mean slowing down - it means gearing up for your best years yet. Our Fit After Forty program offers tailored in-person personal training to help you maintain and even exceed your peak physical fitness. Remember, age is just a number, especially with the right coach by your side.

fit after 40:
personal and group training

To the young athletes out there: ready to elevate your game to elite levels? Our X-Factor program is designed just for you. Drawing from my collegiate football days and extensive coaching experience, I know what it takes to push you past your limits and help you shine in your sport of choice. Let’s unlock your full potential!


X-FaCTOR for young athletes

Constantly on the move or juggling a hectic schedule? Our Online Personal Training is flexible, effective, and crafted to fit into your busy life, not the other way around. All you need is a willingness to commit and a bit of space at home or your office - we'll handle the rest, from a customized workout and nutrition plan tailored to your goals.

online training for busy professionals

The customized and tailored Conditioning Plan built for me by Jim of Silverback Fitness has been incredibly effective. It has helped me re-gain my power and strength quickly. The focus on my posterior chain has benefited my posture, my sleep and has really ramped up my training. It has also repaired quite a few creaks and groans. The spin-off benefit has been improved training for cycling as well.

Jon Palumbo | sarnia, on

Since I've started working out with Jim my posture, endurance and strength have significantly improved. He focuses on overall body work and seems to never miss a muscle. I am enjoying each challenging workout he throws at me!

jamie hayes | sarnia, ON

see what past clients are saying

We believe in building strength, resilience, and confidence. We're more than just a personal training facility; we're a community. A community that cheers each other on, celebrates every victory, no matter how small, and supports each other through every step of your fitness journey.

At Silverback Fitness, we pride ourselves on our professional approach and our deeply personal commitment to each client.

We believe in building strength, resilience, and confidence. We're more than just a personal training facility; we're a community. A community that cheers each other on, celebrates every victory, no matter how small, and supports each other through every step of your fitness journey.

At Silverback Fitness, we pride ourselves on our professional approach and our deeply personal commitment to each client.

At 55, I've lived through the challenges and triumphs that many of you face. From an elite collegiate athlete reaching peak performance to a retired 30-year educator, I’ve walked miles in your shoes. My diverse background allows me to understand and tailor your health and fitness journey to your personal goals. My approach is not just about personal training; it’s about creating a supportive environment where you can thrive - with accountability - to keep you motivated and on track.

At Silverback Fitness, your journey will be supported by my deep understanding of training methodologies - be it strength, cardiovascular, flexibility, mobility, or functional training. My background in education and assessment equips me to offer an experience that goes beyond typical training programs, ensuring that you see measurable improvements and real results.

Ready to start? Reach out today, and let’s craft a personal training plan that’s as unique as you are. Because together we are unstoppable.

meet jim stewart

owner and certified personal trainer