Pre-Exercise Nutrition
topic
Pre-exercise nutrition optimizes glycogen availability, blood glucose stability, and gastric comfort for the exercise ahead — with general recommendations including consuming a mixed meal 3–4 hours before exercise (providing glycogen repletion from carbohydrates, tissue repair substrates from protein, and sustained energy from moderate fat), a carbohydrate-rich snack 1–2 hours before exercise if needed, and avoiding high-fat, high-fiber foods within 1–2 hours of exercise (slowing gastric emptying and risking gastrointestinal distress).
Role
Pre-exercise nutrition is the fueling decision with the most immediate and measurable performance consequences — with appropriately timed carbohydrate and protein intake before strength training increasing muscle protein synthesis by up to 40% compared to fasted training, and with glycogen-depleted endurance exercise producing performance impairments of 15–20% in workouts of 90+ minutes. The majority of recreational athletes have never optimized their pre-exercise nutrition beyond avoiding obviously bad choices — leaving consistent performance improvements available from a modest, specific, evidence-based timing and composition protocol.
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