Our Instructors
Sam Gold
NCCPT Certified Personal Trainer
TPI LVL 1 Titliest Performance Institue
JrFit™ Certified Youth Fitness Specialist
KNS Certified Kids Nutrition Specialist
BMS Certified Bio-Mechanics Specialist
HIIT specialist (High Intensity Interval Training)
Redcord™ Suspension Active Advanced II
Redcord™ Suspension Corrective Exercise
CPR & AED Certified
As the founder of Gold Core, Sam Gold has built a reputation as one of the top strength and conditioning experts in the region. With over a decade of experience in the industry, he has developed an impressive set of skills and knowledge that he uses to help his clients achieve their fitness goals.
Sam's educational background includes a degree from the University of Arizona where he studied Physiology & Anatomy with a minor in sports management. This training has given him a deep understanding of the human body and how it responds to exercise and training. He has also earned certifications as a Certified Functional Strength Coach and from the Titliest Performance Institute, demonstrating his commitment to continued learning and professional development.
At Gold Core, Sam and his team work with clients of all ages and fitness levels, from professional athletes to weekend warriors. They design customized training programs that focus on building strength, speed, and conditioning as well as enhancing overall physical performance. With Sam's guidance, clients are able to reach new levels of fitness and achieve goals they never thought possible.
Outside of his work at Gold Core, Sam is an avid golfer and has a passion for helping golfers improve their game through strength and conditioning. When he isn’t golfing he can often be found hiking with his wife Terry and dog Mango, snowboarding or playing hockey.
With his combination of expertise, experience, and passion, Sam Gold is a driving force in the strength and conditioning industry. His dedication to helping clients achieve their goals has made him a trusted and respected figure in the fitness community.
Nathan Richtiger
ACE Certified Personal Trainer
CPR & AED Certified
Certified Nutrition Coach PN LV1
University of Arizona: Athletic Training Tech
Nathan is graduate from University of Arizona with a degree in Public Health. While attending the University he worked as an Athletic Training Tech for the Arizona Wildcats Football Team. Nathan is certified by the American Council on Exercise (ACE) as a Personal Trainer.
Based on his work with the Arizona Football team, his own injury experiences, and his education Nathan has built a strong understanding of how the body works. Since the age of 17 Nathan has trained with Sam Gold, the owner of Gold Core. Over his years working with Sam, Nathan has learned a variety of workout techniques and is continuing his education in injury prevention and rehabilitation. Nathan is proud to be part of the Gold Core Team and is looking forward continuing his work in the Health and Fitness field.
Nicolas DeRusha
CPR & AED Certified
Certified Personal Trainer
Bachelors Degree in Kinesiology CSU Dominguez
Nicolas DeRusha is a dedicated strength coach at Gold Core, bringing expertise honed through his Kinesiology program at CSU Dominguez, specializing in pre-physical therapy and sports performance. Joining Gold Core as an intern in 2022 under Sam's mentorship, Nic's passion for volleyball shines through, alongside cherishing moments with his girlfriend and beloved dogs.