Health
A series on the fundamentals of health, loosely organized around the classical elements: water, air, earth, and fire. Plus sleep.
In this section
Book 1: Water
The importance of water and its presence in everyday life: intake, moisture, showering, and more.

Book 2: Air
Breath and air quality: circulating air and breathing techniques for running, cold and heat exposure, and strenuous activity like BJJ.
Sleep
What is sleep. Why we sleep. When to sleep. How to improve sleep.