Which statement about hydration planning is false?

• A. Electrolytes help replenish sodium losses and maintain fluid balance
• B. Plain water alone is sufficient in all cases
• C. Hydration planning reduces risk of hyponatremia and cramping
• D. Hydration should be monitored and adjusted based on vitals and symptoms

Answer: (B)

Hydration planning focuses on replacing both fluid and electrolyte losses from sweating to maintain fluid balance and sodium levels. When you sweat, you lose not just water but also electrolytes, especially sodium. Using beverages that include electrolytes helps replenish those losses and supports better fluid absorption and maintenance of blood sodium concentration. Drinking plain water alone cannot always meet these needs, particularly during longer or more intense exertion or in hot environments, because it can dilute sodium in the body and increase the risk of hyponatremia and cramps. That’s why a well-rounded plan often combines fluids with electrolytes and may adjust for pace, environment, and individual sweat rates.

Monitoring vitals and symptoms—such as heart rate, blood pressure, skin feel, urine color, thirst, dizziness, cramps, or confusion—and adjusting the plan accordingly is essential to keep hydration effective and safe. Hydration planning, when done this way, reduces the risk of hyponatremia and cramping and helps maintain overall performance and safety.