marilyn hoyt - Founder/Coach/Instructor RockFit Express


Marilyn is a disabled Army veteran. In 2008 became a turbo kick certified instructor, got her CPT at the National Academy of Sports Medicine,and taught weight resistance and cardio classes.In 2010, Marilyn teamed up with Annette Browning to start Rock Fitness Camp and she became a part-time trainer at LA Fitness in Rowlett. Shortly after, Marilyn was diagnosed with cancer and underwent chemotherapy and radiation treatments. During this time, Marilyn says God taught her so much about His love and how to trust Him with everything. Doctors also raved about her being physically healthy and how her fitness level contributed significantly to her recovery from cancer. God has healed her and she trains others with a purpose.She has been a Fitness Expert for the Nicholson Clinic and MoveMoreFitness LLC and is Certified in Calisthenics through Dragon Door. In 2023, Marilyn teamed up with 9 other fitness professionals to write, Real Talk with Real Fit Pros, and became a published author. Rock Fitness has a purpose to help as many people to live a healthier life and teach them fitness is important to battle life. Rock Fitness is Fitness with a Purpose.

meet our team

Joshua archer

RockFit Elite Coach

Joshua has a Bachelors in Kinesiology, is a former collegiate Track & Field Sprinter, and has helped over 75+ people reached their fitness goals. He’s passionate about fitness and continues to be active as a Texas Legends Strongman 2023 Champion!


Class:Rock Fitness Elite Training
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Cardio & Strength Instructor

Darlene has been a group Fitness Instructor since 1991. She received her Personal Trainer and Biomechanics Certifications through Cooper Institute. She is currently working on her NASM Certification.


Class:Rock-Fit Cardio n Strength
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Yoga Instructor

Natalie is a Certified yoga instructor (RYT-200), She enjoys guiding others to better health, mobility and strength through yoga flow (movement) and restorative yoga (relaxing stretch).

Class:Rock-Fit Yoga
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Zumba Instructor

Blanca gained her Zumba certification over 10 yrs ago. Lot's of energy, loud music, and burning calories. Bring your friend and be ready to SHAKE IT!


Class:Rock-Fit Zumba
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  Rock Fitness, 1022 TX-78 North, Farmersville, TX 75442