Turn understanding into a habit.
Reading is the start; the app is where you apply it day to day — logging, tracking, and adapting to your own numbers. Free to download, private by design.
The science behind the numbers, in plain language.
Short, sourced foundations on how food and movement actually work — then links straight into the tools and libraries that let you apply them. Start anywhere.
Six short reads that make everything else on the site click.
Weight change comes down to energy in versus energy out. Understanding where your calories go makes every other nutrition decision clearer.
The three macronutrients supply all of your energy and most of your body's raw materials. Here is what each one does and roughly how much you need.
You need micronutrients in milligrams or micrograms, not grams — but a shortfall in any one can have outsized effects.
FITT — Frequency, Intensity, Time, and Type — is the simple framework behind almost every good training plan.
Muscles, bones, heart, and lungs adapt to the demands you place on them. Keep the demand rising, gently, and they keep improving.
Fitness is built during recovery, not during the workout. Sleep is the most powerful recovery tool you have.
Each track links into the site's cited libraries and interactive tools.
How food becomes energy and raw material — and how to read what's on your plate.
How the body adapts to exercise, and how to structure training that works.
The numbers that describe your health, and what moves them.
Reading is the start; the app is where you apply it day to day — logging, tracking, and adapting to your own numbers. Free to download, private by design.