#099 The Science of Exercise for Cancer | Kerry Courneya, PhD
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Welcome back to the podcast. I'm Dr. Rhonda Patrick, and today we're discussing a topic that is transforming how we think about cancer prevention, treatment, and survivorship. For decades, exercise was considered an optional part of cancer care, something beneficial for general health, but not essential. That paradigm has completely shifted. The evidence is now overwhelming. Exercise is not just supportive, it's a therapeutic intervention that recalibrates tumor biology, it enhances treatment tolerance, and it improves survival outcomes. At the forefront of this research is today's guest, Dr. Carrie Kernier. He is a professor and Canada research chair at the University of Alberta and one of the most influential figures in exercise oncology.
With over 600 peer-reviewed studies, his work has fundamentally reshaped our understanding of how structured exercise, whether aerobic, resistance training, or high-intensity intervals, can mitigate treatment side effects, enhance immune function, and directly influence cancer progression. Dr. Kernier co-authored the American Cancer Society's and the American College of Sports Medicine's physical activity guidelines for cancer survivors. His work has influenced global recommendations. Each year, 2 million people are diagnosed with cancer in the United States, yet research suggests that up to 40% of cases could be prevented through lifestyle changes. Among the most powerful interventions, exercise.
Regular physical activity has been shown to lower the risk of at least 8 to 10 different cancer types, including some of the most common and deadly forms. And crucially, this protection extends even to high-risk populations. Exercise can reduce cancer risk even if someone is obese, even if they have a family history, and even if they've smoked. In today's conversation, Dr. Kernier breaks down the most effective ways to use exercise for cancer prevention and treatment, what works, how much you need, and why it's so powerful, how much exercise it really takes to lower cancer risk, why vigorous exercise is the most powerful for cancer prevention. How exercise lowers cancer risk even in high-risk individuals and the mechanisms behind this effect.
The best type of exercise for prevention and treatment. We'll compare aerobic training, strength training, and high-intensity interval training to see which delivers the biggest impact for lowering risk and improving treatment outcomes. How and why exercise improves cancer treatment outcomes, including cancer-related fatigue, sleep, anxiety, and how it helps patients tolerate chemotherapy and radiation more effectively. Why muscle mass matters for survival and how much training is needed. How exercise enhances drug effectiveness. Exercise improves blood flow to tumors, making chemotherapy and radiation treatments more effective by increasing oxygen and drug delivery. We'll also discuss new frontiers in exercise oncology.
Can exercise act as a pressure wash for circulating tumor cells? Could high-intensity interval training be a form of cancer immunotherapy? We explore emerging research that is changing the way we think about cancer care. By the end of this episode, you'll have a clear science-backed roadmap on how to use exercise to lower cancer risk, to improve treatment outcomes, and to enhance overall health. Before we dive in today's episode, I want to share with you something I'm really excited about. I put together a free in-depth guide on how to structure your training based on insights from nearly 100 episodes of conversations with the world's leading experts in exercise physiology and human performance.
It covers everything from the most effective resistance training protocols for building muscle to specific interval training strategies for improving VO2 max to key factors like protein timing, creatine supplementation, and more. This is all distilled into clear, actionable protocols that you can start using right away. To get this free protocol guide and immediately start applying it to your own training, just head over to howtotrainguide.com.
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