Metabolic Flexibility

Muscle mass supports resilience, but it is insufficient without control, stabilization, mobility, and connective tissue integrity. A metabolically fit person can use fat-derived ketones and handle carbohydrates effectively. The article frames durability against injury as more valuable than simply increasing strength or muscle size. A metabolically flexible person experiences no hunger, cravings, fatigue, or irritability as fuel sources switch. The goal of flexible fasting is metabolic flexibility in response to changing food availability. Ketogenic diets and intermittent fasting can improve metabolic flexibility, but permanent strict ketosis may create inflexibility. The body benefits from resilience rather than constant restriction. A healthy metabolism should move into fat-burning and ketosis smoothly when glucose and glycogen availability decline. Ketones are presented as efficient neuronal fuel linked to mental energy, focus, and reduced food fixation. Sleep is presented as Horton's primary recovery lever, with nine hours making him feel best. Noradrenaline rises during the metabolic switch and is associated with increased focus and energy. Ketones are described as an alternat…