
Biohacking Fight or Flight: Mastering Your Stress Response
How the HPA axis, cortisol rhythm, and vagal tone shape your stress response, plus evidence-based tools to train resilience and raise HRV.
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Explore Dr. Andrew Hill's comprehensive neuroscience insights on hrv. This collection spans articles, podcast conversations, and live neurofeedback sessions, covering the latest research, clinical applications, and practical strategies.
From 25+ years of clinical neuroscience and 25,000+ brain maps, Dr. Hill brings evidence-based approaches to brain optimization, combining rigorous research with accessible explanations designed for intelligent, curious readers seeking to understand and optimize their brains.

How the HPA axis, cortisol rhythm, and vagal tone shape your stress response, plus evidence-based tools to train resilience and raise HRV.

What happens in your brain during flow, the conditions that trigger it, and the training protocols that make peak performance more accessible.

What meditation does to your brain: prefrontal control, amygdala reactivity, default mode network, and a dose-response protocol you can actually run.

Sleep quality is built during the day, especially the first hour after waking. The neuroscience of circadian timing, light, temperature, and SMR training.

Anxiety is a specific brain state with circuit-level signatures. Learn how HRV training, neurofeedback, breathing, and hormesis target the machinery directly.
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