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In this “Ask Me Anything” (AMA) episode, Peter dives deep into the question of whether there is such a thing as “too much exercise.” He explores the theoretical “J-curve” relationship between exercise and longevity, whereby mortality risk declines with increasing activity levels only to see an uptick above a certain exercise volume threshold. While Peter maintains that exercise is perhaps the single most important tool we have to live longer and live better, he explains the challenges involved in identifying an optimal dose. He takes a hard look at studies—many of which have contradictory results—to highlight major limitations in methodology and how readers could be misled. Additionally, he discusses the rare, but real, risks associated with extreme levels of physical activity and concludes by weighing the benefits against the risks of exercise.
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#177 - Steven Rosenberg, M.D., Ph.D.: The development of cancer immunotherapy and its promise for treating advanced cancers
#176 - AMA #27: The importance of muscle mass, strength, and cardiorespiratory fitness for longevity
#175 - Matt Kaeberlein, Ph.D.: The biology of aging, rapamycin, and other interventions that target the aging process
#174 - Lawrence Wright: The 20th anniversary of the 9/11 attacks: reflections on how they happened, and lessons learned and not learned
#173 - AMA #26: Continuous glucose monitors, zone 2 training, and a framework for interventions
#172 - Esther Perel: The effects of trauma, the role of narratives in shaping our worldview, and why we need to accept uncomfortable emotions
#171 - Steve Austad, Ph.D.: The landscape of longevity science: making sense of caloric restriction, biomarkers of aging, and possible geroprotective molecules
#170 - AMA #25: Navigating the complexities and nuances of cancer screening
#169 - Katherine Eban: COVID-19 Lab Leak: Examining all sides of the debate and discussing barriers to a full investigation
#168 - Hugh Jackman: Reflections on acting, identity, personal transformation, and the significance of being Wolverine
#167 - Gary Taubes: Bad science and challenging the conventional wisdom of obesity
#166 - Patricia Corby, D.D.S.: Importance of oral health, best hygiene practices, and the relationship between poor oral health and systemic disease
#165 - AMA #24: Deep dive into blood glucose: why it matters, important metrics to track, and superior insights from a CGM
#164 - Amanda Smith, M.D.: Diagnosing, preventing, and treating Alzheimer’s disease, and what we can all learn from patients with dementia
#163 - Layne Norton, Ph.D.: Building muscle, losing fat, and the importance of resistance training
#162 - Sarah Hallberg, D.O., M.S.: Challenging the status quo of treating metabolic disease, and a personal journey through a grim cancer diagnosis
#161 - AMA #23: All Things Nicotine: deep dive into its cognitive and physical benefits, risks, and mechanisms of action
#160 - Paul Offit, M.D.: The latest on COVID-19 vaccines and their safety, herd immunity, and viral variants
#159 - Peter Hotez, M.D., Ph.D.: Evolution of the anti-vaccine movement, the causes of autism, and COVID-19 vaccine state of affairs
#158 - Brian Deer: A tale of scientific fraud—exposing Andrew Wakefield and the origin of the belief that vaccines cause autism
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