Category: Hydration

Sodium Loss During Exercise: Endurance Fueling

By FitMetricsHub Editorial Team
2026-06-25
5 min read

1. The Impact of Sodium Depletion

Endurance athletes who sweat heavily over several hours can lose significant amounts of sodium. If not replenished, this can lead to muscle cramping, fatigue, and hyponatremia.

2. Target Replenishment Guidelines

For workouts lasting over 2 hours: Calculate your hourly sweat rate and estimate your sodium concentration. Target replenishing 300 to 900mg of sodium per hour of exercise, depending on your individual sweat profile.

Article FAQ Schema

Review additional questions and references discussed in this health literature.

Hyponatremia is a potentially dangerous condition that occurs when blood sodium levels drop too low, often caused by drinking excess plain water without adequate electrolytes.

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