Which of the following is identified as the body's energy source in the material?

• A. Simple Carbs
• B. Fats
• C. Complex Carbs
• D. Protein

Answer: (C)

The body’s energy during sustained activity comes from carbohydrates, with different types providing different timing of energy release. Complex carbohydrates are identified as the energy source because they are digested more slowly than simple sugars, delivering a steady stream of glucose to the bloodstream and helping maintain glycogen stores in muscles and liver. This steady supply supports longer-duration performance and prevents the energy dips that can happen after quick spikes from simple carbs. Fats contribute a large energy reserve but are used more during longer, lower-intensity activity and require more oxygen, so they aren’t the immediate source for quick or sustained bursts of energy. Protein isn’t the body’s primary energy source under normal conditions. So, complex carbohydrates are the best match for providing sustained energy.