MAIN IDEA:

This book combines the author’s experience as a trader routinely experiencing stress and his interest in the biology of stress. The main point is that it is a complex chain of multiple feedbacks between high stress environment and its impact on body that results in specific behavior, which in turn causes environmental changes. Here is one of the author’s main points:” Normally stress is a nasty experience, but not at low levels. At low levels it thrills. A nonthreatening stressor or challenge, like a sporting match, a fast drive, or an exciting market, releases cortisol, and in combination with dopamine, one of the most addictive drugs known to the human brain, it delivers a narcotic hit, a rush, a flow that convinces traders there is no other job in the world.”

MY TAKE ON IT:

This book is one more book that confirms my understanding of the wholeness of mind/body when everything is interconnected and works as one complex system. The working of this system includes:

1. Receiving multiple signals from the external environment and internals of the body
2. Building a distorted image of the situation in such a way that it optimizes body functions to support actions necessary for survival
3. Implementing these actions on the environment
4. Analyzing results and going back to a.

One of the most interesting parts of this book for me was describing some of the body parameters such as heart rate variability, that I was unfamiliar with. Another example of helpful information from this book is the graph of feedback loops timing between the brain and other parts of the body: