Discuss the role of fat as a fuel during exercise and the effect of fat loading on performance.

1. 1 · Open in two lines. Fat is the body's largest energy store and the main fuel for long, low-intensity exercise. Its use is slow and needs oxygen.
2. 2 · Draw a store comparison. [Bar chart: glycogen about 2000 kcal vs fat over 50,000 kcal in a lean adult]
3. 3 · Sources and how fat is burned.
   • Adipose tissue, IMTG, blood triglycerides.
   • Lipolysis (adrenaline on, insulin off).
   • Carnitine carries fatty acids into mitochondria; beta-oxidation.
4. 4 · When fat is used. Low to moderate intensity, long duration, trained muscle, low-carbohydrate state.
5. 5 · Fat loading method. 5-10 days high-fat, low-carbohydrate eating, often with one high-carbohydrate day before the event.
6. 6 · Effects on performance.
   • Fat burning up; glycogen use down.
   • High-intensity efforts impaired.
   • No consistent endurance benefit; not generally advised.
7. 7 · Nutrition link. Fat at 20-35% of energy from oils, nuts, seeds and fish; avoid fried foods before events.
8. 8 · Close in one line. Fat is a vital endurance fuel, but carbohydrate, not fat loading, wins races.

Scoring tip: End with the fat-loading vs carbohydrate-loading contrast; it shows judgement, not just recall.