Sodium
The primary electrolyte in sweat. Essential for hydration, performance and preventing hyponatraemia.
Why it matters
Sodium is the primary electrolyte in extracellular fluid and the most abundant mineral lost in sweat. It regulates blood pressure, fluid balance, and nerve and muscle function. For endurance athletes, sodium is far more than just a dietary concern it is a critical performance and safety variable.
For endurance athletes
During long efforts, replacing sodium alongside fluid is essential. Drinking large volumes of plain water without replacing sodium can lead to hyponatraemia dangerously low blood sodium a serious and potentially fatal condition most common in long-distance events. Sweat sodium concentration varies significantly between individuals; salty sweaters need to pay particular attention.
Signs of deficiency
- ·Nausea and headache during exercise
- ·Muscle cramps on long efforts
- ·Confusion or disorientation (severe)
- ·Swelling of hands and feet
Best food sources
- ·Sports drinks and electrolyte tabs
- ·Salted snacks
- ·Pickles and olives
- ·Cheese and processed meats
- ·Table salt
Track Sodium automatically
MOVE logs micronutrients from every food you eat and shows sport-specific context alongside your numbers.