Bob Tygenhof, MA, CPT

About Bob Tygenhof, MA, CPT

Bob received his undergraduate degree at Princeton University and a Master’s degree from the University of Southern California, followed by a long and successful career as the owner and director of a boutique advertising agency. Following the sale of his firm, he moved on to a second career, combining his lifetime love of physical fitness, exercise, and nutrition with a new career as a certified Lifestyle Educator and an ACSM-Certified Personal Trainer. Bob became the Director of the Center for Active Lifestyle Medicine at Integrative Medical Group of Irvine seven years ago and has created programs to assist his patients navigate through the myriad challenges involving their lifestyle, exercise and fitness, nutrition and stress to optimize their potential for a long and healthy life.

Once your doctor establishes an overall treatment plan, Bob will help you implement the prescribed lifestyle changes. He will evaluate your precise body composition and guide you through our unique metabolic/anti-inflammatory program, introduce you to the wide-ranging benefits of a Fasting Mimicking Diet (ProLon), assist you to achieve your optimal body weight and composition, and then help you transition to a long-term nutrition program customized to your specific medical condition and personal tastes. Bob is well-versed in Mediterranean, vegetarian, paleo, ketogenic, and vegan diets; stays up-to-date on the latest nutrition, fitness, and environmental medicine research; and coordinates all recommendations with your doctor.

All patients benefit from a baseline fitness assessment, which is geared to each individual’s specific age and fitness status. This is followed by a personalized exercise prescription, with specific exercise routines matched to one’s particular strengths and weaknesses. Individual or small-group fitness classes are available at our in-office fitness studio. Bob will always keep your doctor fully apprised of your fitness progress and status. Numerous patients have experienced dramatic improvements in their health status with documented reversals of metabolic disease, fatty liver, and achievements of significant and permanent weight loss.

Bob has been physically active his entire life – as a championship wrestler in high school and college, as a member of the crew (rowing) team at Princeton University, as a black belt in one of the martial arts, and as a recreational runner, soccer and tennis player. He also coached his four children in soccer and baseball. He currently lifts weights four times each week; while running, rowing, and cycling the other three days. He is certified as a personal trainer by the American College of Sports Medicine, the oldest and largest of the fitness industry’s certifying organizations.


  • Bachelor’s Degree: Princeton University | Princeton, New Jersey
  • McConnell Graduate Fellowship: American University in Cairo | Cairo, Egypt
  • Master’s Degree: University of Southern California | Los Angeles, California
  • Lifestyle Educator: Metagenics | Aliso Viejo, California
  • Fitness Specialist Certificate: Irvine Valley College | Irvine, California


  • Lifestyle Educator: Metagenics
  • Personal Trainer: American College of Sports Medicine
  • First Aid and CPR/AED certified: American Red Cross

Lectures and Presentations

  • Polycystic Ovarian Syndrome – An Integrative Approach to a Complex Epidemic, October 31, 2013. International Congress for Clinicians in Complementary and Integrative Medicine, Northwestern Memorial Hospital | Chicago, Illinois.
  • PCOS and Exercise, November 17, 2015.  PCOS-2015, Polycystic Ovarian Syndrome Medical Conference | Seattle, Washington.
  • Exercise and Fitness – Keys to Healthy Living for You and Your Patients, March 23, 2016. Orange County Medical Association | Irvine, California.
  • Being Safe in an Unsafe World – Protecting You and Your Family from Environmental Toxins, a 12-part series broadcast on ZubiaLive, July and August, 2017.

When it comes to lifestyle change, Bob believes that gradual, yet impactful, progress is usually the best way to go. This allows your body, mind, and spirit to adapt without becoming overwhelmed. While achieving ultimate goals takes longer, a measured approach is almost always safer, more enjoyable, and far more successful.


Bob is available to see patients on most days of the week, and appointments can usually be arranged within one to two days. Please click here, if you would like to make an appointment.