Join the Judgement Free Zone® – Inspire Others as a Certified Fitness Trainer. . At Planet Fitness, we pride ourselves on creating a welcoming, non-intimidating environment where everyone feels comfortable reaching their goals. We’re currently looking for. Certified Fitness Trainers. who are upbeat, engaging, and ready to help our members feel confident and supported in their fitness journey. As a. Certified Fitness Trainer. you’ll run our group ...