Which topic would be most appropriate to include in a physical education lesson on the importance of water consumption to health and well-being?

• A. The functions of sodium and potassium in the body
• B. The role of fiber in hydration
• C. The effects of dehydration on performance
• D. The importance of protein intake for hydration

Answer: (A)

Understanding how electrolytes regulate fluid balance and hydration. Sodium and potassium are essential for maintaining the body's fluid compartments, blood volume, and the electrical activity that enables nerve signaling and muscle contraction. In physical activity, you lose water and electrolytes through sweat, so knowing how these minerals function helps students connect drinking water to staying hydrated, preventing fatigue, cramping, and dizziness, and supporting performance and well-being. While topics like dehydration's impact on performance are important, grasping the roles of sodium and potassium provides a foundation for why water, in combination with electrolytes, matters during exercise.