Dr. Bruce D. Johnson, Ph.D., is a renowned Professor of Medicine and Physiology at the Mayo Clinic, where he also consults in Cardiovascular Medicine and holds joint appointments in Preventive, Occupational & Aerospace Medicine and Physiology & Biomedical Engineering. He directs the Mayo Clinic Research Unit’s Energy Balance Core Laboratory and leads the Human Integrative and Environmental Physiology Laboratory. His work focuses on how extreme environments affect cardiovascular and pulmonary physiology—conducting studies in Antarctica, on Everest and Aconcagua, with breath-hold divers and fighter pilots—and on developing wearable health-monitoring technologies.

Dr. Raghu R. Chivukula, M.D., Ph.D., is an Assistant Professor of Medicine and Surgery at Harvard Medical School and an attending physician in Pulmonary & Critical Care Medicine at Massachusetts General Hospital. A physician-scientist and group leader in the Center for Genomic Medicine, he investigates the molecular and organelle-level mechanisms underlying rare genetic lung diseases. He trained at Johns Hopkins University, completed his residency and fellowships at MGH/Harvard, and has earned awards including Forbes "30 Under 30" and the ASCI Young Physician-Scientist Award.

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Timothy O’Donnell is an elite American long-distance triathlete, crowned ITU Long Distance World Champion in 2009. Over his career, he’s earned more than 50 podium finishes—including nine Ironman 70.3 victories, two full Ironman wins, and six Armed Forces National Championships—and consistently ranked among the top Americans at the Ironman World Championship in Kona.

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