meet yOur Team


Dr. Natalie Marshall

Dr. Natalie Marshall is a board-certified Medical Oncologist and Breast Cancer specialist. She was voted a Top Doc for San Francisco Bay Area and elected by her peers to Leading Physicians of the World. Dr. Marshall in intensely interested in the effect of lifestyle modifications on quality of life and recurrence risk reduction in cancer patients and in the prevention of cancer in unaffected individuals. It motivated her to approach Dave Spitz to design a strength training program for risk reduction and prevention. She trains at California Strength for Olympic weightlifting in the master’s division and has seen firsthand the excellent coaching and programming that is offered to athletes of all types and ages. Survivor Strong is that skill translated for patients so access to this important treatment is available to anyone regardless of place of residence, financial resources, or fitness level.

Education and Training

  • Medical School: University of Texas Medical Branch, Galveston, Texas

  • Internship and Residency in Internal Medicine:  University of New Mexico, Albuquerque, New Mexico

  • Fellowship in Medical Oncology:  Yale New Haven Hospital, New Haven, Connecticut


David Spitz

Dave Spitz is the owner and head coach of California Strength, a facility in San Ramon, CA that specializes in human performance. He is a Certified Strength & Conditioning Specialist (CSCS) and holds the distinction of a USA Weightlifting Senior International Coach. Since 2008, California Strength has produced numerous NFL Athletes, world class Olympic weightlifters and helped people around the world achieve their goals through various online programs. His experience and knowledge in human performance has helped guide the development of the Survivor Strong program.

Education and Training

  • University of Southern, California

  • Certified Strength & Conditioning Specialist

  • USA Weightlifting Senior International Coach