FROM MY PT SCHOOL NOTES · NUTRITION · UNIT 2 · CHAPTER 05
Water, Electrolytes, and Minerals
Fluid and mineral status links nutrition to muscle contraction, nerve transmission, blood volume, bone integrity, and oxygen transport.
What matters most
- Water as transport medium. Water supports circulation, temperature regulation, delivery of nutrients, and waste removal. Needs vary with exertion, temperature, illness, and fluid restrictions.
- Sodium and potassium. Essential to fluid regulation, electrical excitability, and muscle/nerve function; dietary restrictions and supplementation must consider kidney function and medications.
- Calcium and phosphorus. Key to bone mineralization; calcium also contributes to neuromuscular signaling and coagulation.
Hydration clarification: sweat often contains proportionately more sodium than potassium. Replacement needs vary by duration, environment, conditions and medications; do not infer an electrolyte problem from cramps alone.
The PT connection
Headache, dizziness, cramps, fatigue, or poor exercise tolerance should not automatically be attributed to “dehydration” or “low magnesium.” Assess red flags, medications, vital signs, and medical context.
Current-practice perspective
The source provides historical population averages and some fixed daily water rules. Avoid using them as universal prescriptions, especially with heart failure, kidney disease, or electrolyte disorders.
From my original course material: 5 Minerals.pdf (pp. 2–16, 17–29, 31–52). These are personal PT-school class notes adapted for education. Historical claims require current source verification. Not individualized nutrition advice or a substitute for a registered dietitian or prescribing team.
