Fitness Principles — Local services in Boston

I have been a client of Fitness Principles for more than two decades and hope to continue for several more. Keith is a remarkable trainer and coach, who meets his clients where they are and then quietly helps them move towards better health and fitness. He is also a great guy! Fun, smart, and kind. His workouts are varied and imaginative, and my husband and I always leave our sessions feeling proud...

Fitness Principles and Keith changed my life. I didn't have the body that I wanted so Keith and his team gave me the diet, the program, and the motivation to get into shape. If you are looking to make lasting changes in your life, see Keith...

Exceptional personal training! The owner and trainer Keith really cares his clients and he always go above and beyond to help achieve their goals. Small and private gym that feels more personal. Certainly my...