WHY THIS HAPPENS
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Compensatory eating — long rides drive appetite for 24-48 hours after
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Under-reporting food intake by 20-40% (this is universal, not a willpower failure)
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Chronic cardio builds cortisol, which drives fat retention in some riders
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Muscle loss from insufficient protein masks fat loss on the scale
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Low-intensity-only riding doesn't create the metabolic adaptation needed for fat loss
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Sleep debt — under 7 hours wrecks insulin sensitivity
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Alcohol more than 3 units per week pauses fat oxidation for 24+ hours per session