Bob Tygenhof is a 68-year old gym rat and health professional. A former advertising industry executive, Bob pursued a second career as a certified fitness specialist and nutritionist with the Integrative Medical Group of Irvine, California. A long-time exercise devotee, Bob follows a rigid program of strength and aerobic training, in between coaching patients on personalized programs. Working alongside doctors, he also overseas patients following a Fasting Mimicking Diet (FMD), called ProLon, for body weight management and longevity. The Irvine medical practice was among the first to embrace the diet, developed by Dr. Valter Longo at the University of Southern California (USC). LLAMA host Peter Bowes took part in an early clinical trial and was one of the first human guinea pigs to try out the FMD. He discusses it in detail with Dr. Longo in LLAMA episode 01. In this in-depth interview, recorded at the 2017 Podcast Movement gathering in Anaheim, California, Bob Tygenhof explains his motivation for a relentless exercise program and devotion to a lifestyle focussed on longevity.