Muscle Under Fitness
(310) 859-1399



In 1980, Steve Thornberry created MUSCLE under, a privately owned and run company providing personal fitness training in various health clubs from Australia to Beverly Hills. Steve received his degrees in physical exercise and kinesiology at the Institute of Sports in Australia in 1978.

Steve is a professional and personal trainer with a strong clientele of celebrities, producers, executives, lawyers and doctors. MUSCLE under is available only for private training and his trainers are degree certified and bonded. Steve has personally trained each staff member and will supervise all training methods to help you achieve your goals.


9229 Sunset Blvd.
West Hollywood, CA 90069

(310) 859-1399
E-mail Steve for More Information

Private Professional Appointment Only