Robert Tygenhof is an American College of Sports Medicine-certified personal trainer. He is the practice administrator and director of lifestyle therapies at the Integrative Medical Group of Irvine, a practice that provides comprehensive health care for men and women by combining the best evidence-based therapies from conventional and integrative medicine. He performs body compositions and fitness assessments, while also providing nutrition and stress management programs for practice patients. He trains a select group of patients at the onsite gym to promote weight management, extended health span, and longevity.

Robert received his undergraduate degree from Princeton University, his MA degree from the University of Southern California, his fitness specialist training at Irvine Valley College, and completed fellowship studies at the American University in Cairo.