Michael Joyner, M.D., a physician-researcher and expert in exercise physiology, delves into the crucial role of VO2 Max in health and longevity. He explains how this measure not only affects athletic performance but also serves as a predictor of lifespan. The conversation covers whether obesity is more genetic or environmental and discusses practical strategies for improving VO2 Max. Joyner emphasizes the importance of exercise over medication and addresses the complexities surrounding obesity and chronic diseases for better overall health.