Placentia’s #1 Fitness Results Service – 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. Placentia, CA.