Introduction
This open access textbook was created for NFSC 303 Nutrition and Physical Fitness at CSU, Chico with support from CAL$. This book covers basic nutrition science, principles of physical activity, and an introduction to sports nutrition to give the reader an understanding into how nutrition and exercise work together to influence quality of life and risk of chronic disease. Food is discussed as fuel for living a healthy active lifestyle, not as something to be restricted or demonized.