OCR Cambridge National Sports Studies Practice Exam

Carbohydrates are the body's primary fuel for activity, especially at higher intensities, and they are stored as glycogen in muscles and liver to be used during exercise. Proteins mainly repair and build tissues, supporting muscle recovery and adaptation after training. Fats provide a dense energy source, especially useful for longer, steadier efforts, and they also play a role in hormone production and overall energy availability. Hydration is essential because it supports blood volume, sweating, and heat dissipation, helping to maintain performance and the body's temperature regulation during exercise. This combination correctly reflects how each macronutrient contributes and why staying hydrated matters for performance. Statements that claim carbohydrates are unnecessary or that hydration has no effect on thermoregulation misstate how the body uses fuel and manages heat.