Nutrition Fundamentals

Nutrition saved my life long before I realized it.

For years, I thought fitness was mostly about exercise. If I trained hard enough, often enough, everything else would take care of itself. I was wrong. Exercise matters, but nutrition is the fuel that makes exercise work—or fail.

Nutrition and exercise are equal partners. One without the other simply doesn’t get you where you want to go.

Calories: Your Body’s Fuel
Every bit of energy your body uses comes from calories, and calories come from three sources:

Protein
Carbohydrates
Fat

These are called macronutrients. Understanding them—even at a basic level—gives you control over how you feel, how you age, and how your body performs.

Protein: The Rebuilding Nutrient
Protein is best known for building and repairing tissue. Every gram of protein provides four calories, but its real value isn’t energy—it’s structure.

Your body is constantly rebuilding itself. Muscle, bone, skin, organs—all of it is in a constant cy...