Which energy sources may a performer use during competition?

• A. Carbohydrates
• B. Proteins
• C. Fats
• D. Creatine/phosphocreatine

Answer: (A)

Carbohydrates are the energy source most used during competition because glycogen stored in muscles and liver can be rapidly broken down to glucose and quickly converted into ATP through glycolysis and related pathways. This fast supply supports the high-intensity efforts typical of many competitive actions. Fats provide more total energy per gram but require more oxygen and are slower to mobilize, so they dominate at lower intensities or longer durations. Proteins aren’t a primary energy source during competition, except in extreme energy deficits. Creatine/phosphocreatine offers only a very rapid, short-lived burst of energy at the start of activity and is quickly depleted, so it isn’t a sustained energy source during ongoing competition.