Potassium
Key electrolyte lost in sweat. Regulates muscle contractions and fluid balance.
Why it matters
Potassium is an essential electrolyte that regulates fluid balance inside and outside cells, supports muscle contractions, and maintains normal heart rhythm. It works in close partnership with sodium the balance between these two minerals governs how efficiently muscles fire and how well the body manages hydration.
For endurance athletes
Athletes lose potassium through sweat, with losses accelerating in heat and during long efforts. Low potassium can cause muscle weakness, cramping, and impaired performance. During multi-hour sessions or events, replacing potassium alongside sodium and fluid is essential for sustained performance.
Signs of deficiency
- ·Muscle weakness and cramping
- ·Fatigue
- ·Irregular heartbeat
- ·Constipation
Best food sources
- ·Bananas and plantains
- ·Potatoes and sweet potatoes
- ·Avocados
- ·Beans and lentils
- ·Yogurt
- ·Spinach and kale
Track Potassium automatically
MOVE logs micronutrients from every food you eat and shows sport-specific context alongside your numbers.