Which nutrient primarily supplies energy for sport performance?

• A. Carbohydrates
• B. Protein
• C. Fluids
• D. Vitamins

Answer: (A)

Carbohydrates provide the quickest and most available energy for sport. When you exercise, especially at higher intensities, your muscles rely on glucose and stored glycogen to fuel ATP production rapidly. This makes carbohydrates the primary energy source for performance, because they can be broken down quickly to meet the energy demands of fast, powerful movements.

Fats can supply energy too, but they’re used mainly at lower intensities or for longer, endurance efforts and slower to convert to ATP. Proteins aren’t a main energy source in regular exercise; they’re more about repair and growth. Fluids are essential for hydration, which supports performance, but they don’t supply calories. Vitamins support metabolism, yet they don’t provide energy themselves.