Why This Conversation Matters

Most people fear cancer, but they're never given a clear explanation of what it actually is, how it progresses, or why metastasis, not the initial tumor, is what kills 90% of people with solid tumors. And here's what almost no one talks about…30 minutes of exercise per day can down-regulate 13 types of cancers.

I break down the biology of cancer and metastasis in plain language, then walk you through the evidence linking exercise to cancer outcomes across prevention, treatment, and survivorship. I explain how cancer cells have to physically enter circulation and survive a hostile journey to metastasize, and here's the part that changed how I think about high-intensity exercise: as shear stress increases during vigorous exercise (zone 5, 90%+ max heart rate), survival of circulating tumor cells decreases. I also cover immune surveillance, metabolic signaling, and why this is deeply personal for me.

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Topics Discussed

00:00 Intro: Why Cancer Is What Scares Me Most

01:37 Why We're Having This Conversation

03:33 What This Episode Covers: The Three-Part Framework

06:21 What Cancer Actually Is: When Cells Break the Rules

07:25 Metastasis: The Part of the Story No One Explains

27:57 Shear Stress and Circulating Tumor Cells: The Zone 5 Effect

30:16 Immune Surveillance: How Exercise Mobilizes Killer Cells

30:51 Metabolic Signaling: Insulin, IGF-1, and Inflammation

32:16 Limitations: What the Evidence Can and Can't Tell Us

34:37 Practical Framework: Prevention, Treatment, and Survivorship

36:04 Closing: Exercise as Repeated Physiological Stress

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I’m Louisa Nicola - clinical neurophysiologist - Alzheimer’s prevention specialist - founder of Neuro Athletics.

My mission is to translate cutting-edge neuroscience into actionable strategies for cognitive longevity, peak performance, and brain disease prevention.

If you're committed to optimizing your brain- reducing Alzheimer’s risk - and staying mentally sharp for life, you’re in the right place.

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