About US

Precision Fitness Placentia is owned by Placentia’s top fitness expert, Stewart Knorr CPT. He has over 15 years of experience as a personal trainer.

Precision Fitness Placentia has helped 1000’s of Placentia, Yorba Linda and Brea residents drop body fat and get in the best shape of their lives.

We use state of the art personal fitness training techniques such as our signature 4 pillars of human movement techniques which is designed not only get you in the best shape of your life, but also increase your ability to move in a functional manner.

Precision Fitness Placentia includes a Private gym, Nutritional guidance, State of the art personal training, NO Membership fees, NO contracts 100% money back guarantee all for as low as $18-$27/session.

Call today for your free body diagnostic evaluation!

714-223-9500 or 714-883-8940

Meet Stewart Knorr

Precision Fitness Placentia is owned by Placentia’s top fitness expert, Stewart Knorr CPT. He has over 15 years of experience as a personal trainer.

Precision Fitness Placentia has helped 1000’s of Placentia, Yorba Linda and Brea residents drop body fat and get in the best shape of their lives.

We use state of the art personal fitness training techniques such as our signature 4 pillars of human movement techniques which is designed not only get you in the best shape of your life, but also increase your ability to move in a functional manner.

Precision Fitness Placentia includes a Private gym, Nutritional guidance, State of the art personal training, NO Membership fees, NO contracts 100% money back guarantee all for as low as $18-$27/session.

Precision Testimonials


Karen Christensen

I love the individual attention you get with Stewart. Looking forward to my 2018 goals of being stronger and healthier!


Horst Weidtmann

2 1/2 yrs now and still going regularly. That’s a record for us. Great workout plans always.


Susan Wan-Ross

The only fitness gym that I got consistent results for a longer period of time! And I’m still going!


Tom Mosley

Starts where you are to help get you back into shape!!!

Transformation Zone

Ready to completely change your health and fitness?

Book your FREE breakthrough CONSULTATION now

  • Access to a private gym
  • Never wait for gym equipment
  • Train like an athlete
  • Have access to injury modification
  • Receive expert guidance
  • Prolong your active lifestyle
  • Learn insider tips for gaining lean muscle
  • Feel and look younger
  • This field is for validation purposes and should be left unchanged.