Info dump: Some Important Models for Health and Fitness

According to LessWrong, contributor benwr has synthesized his personal health and fitness models, covering concepts he believes high school health classes should teach. His framework divides nutrition into two things: energy and materials. Your body operates primarily on ATP—adenosine triphosphate—which cells generate by breaking down food. For short-term energy storage, your body converts glucose into glycogen, mostly stashed in muscles and liver. Hydrated glycogen weighs roughly one gram per kilocalorie. Longer-term storage as fat is far more efficient: about one-eighth of a gram per kilocalorie. Different macronutrients deliver different energy: fat at nine calories per gram, while protein and carbohydrates each provide four calories per gram. The author emphasizes this is a personal framework for self-optimization, not universal advice. He shares his own practice: tracking food intake and protein targets, lifting weights, and walking regularly.

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