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AOS Kettlebell Instructor, AFAA – Personal Trainer


Strive for progress not perfection.


Bill has been with Infinite Fitness from the beginning with a strong desire and commitment to help people enhance both their bodies and their minds while working out and living healthier lifestyles. Bills favorite tool in the gym is the Kettlebell. He is a Certified “Art of Strength” Kettlebell Instructor.

Bill also is the President of a General Contracting Company, where he spends his time developing and managing contracts for major oil companies.

He’s an outdoor enthusiast, he hunts and enjoys snowmobiling and was actively involved for many years coaching Youth Lacrosse.

Bill with Clients


We have a very busy lifestyle juggling two careers, a family with small children, and still trying to find time to exercise. Our time available for exercise is very limited, so when we have some we need to make it count. Working out with Bill Marquis does exactly that; he always pushes us a little harder than we would push ourselves, and mixes up the exercises to keep the workouts from becoming routine. He keeps our personal goals in mind and comes up with creative ways to help us reach them. Add to all of this that he is always positive, supportive, and keeps us laughing. We would recommend Bill to anyone who is looking to take their fitness to the next level.
- Scott and Susan Ellison

I have been a customer of Infinite Fitness for over five years and it has been a positive life changing experience for me. Bill Marquis is a great personal trainer and has kept me focused and motivated toward reaching my goals and improving my health and physical condition. He knows my capabilities, genuinely cares about my health and well-being and understands just how to challenge me to achieve my goals. It has been so transformative for me, that I have brought the Infinite Fitness experience to my employees, offering personal training to my employees as a company paid benefit. They love it! Melissa, Bill and the team at Infinite Fitness are successful because of the success that they help others like me to achieve in our lives. I would highly recommend them to anyone who wants to make a positive change in their life!
- Al Letizio Jr., Submitted February 21, 2014