Electrolytes: Hydration Strategy for Performance and Recovery

Why Electrolytes Matter

Electrolytes such as sodium, potassium, and chloride regulate fluid balance, nerve conduction, and muscle contraction. Losses increase with sweat rate, heat exposure, and prolonged training.

Evidence Snapshot

• Endurance Performance: Electrolyte replacement supports fluid retention and reduces hyponatremia risk during long events.
• Heat Tolerance: Sodium intake supports plasma volume and thermoregulation.

Practical Dosing

For prolonged exercise, 300–600 mg sodium per hour is a reasonable starting point. Higher sweat losses may require individualized plans based on body size and environmental conditions.

Safety Considerations

Individuals with hypertension or kidney disease should discuss higher sodium strategies with a clinician. Overconsumption without appropriate fluid intake can cause gastrointestinal upset.

Bottom Line

Electrolyte supplementation is a targeted tool for athletes training in heat or for long durations, and should be individualized to sweat rate and medical history.