Why Am I Still Cramping If I Take Electrolytes?

Why doesn't more electrolyte fix it?

Because you are probably adding the one you already have enough of.

Most electrolyte products are built around sodium, with some potassium and a little magnesium. If sodium was never your limiting factor, more sodium does not help. It can make things worse, by pushing a ratio further from where it should sit.

Four minerals govern muscle contraction:

A muscle that will not release is not necessarily short of everything. It is often short of the one that lets go.

The two ratios that matter

Calcium to magnesium. Contraction versus relaxation. When calcium sits high relative to magnesium, muscles contract readily and release reluctantly. Both values can be inside their normal ranges while the relationship between them is not.

Potassium to sodium. This governs the voltage across the cell membrane that makes a muscle fire at all. Loading sodium without matching potassium shifts it.

What about hydration?

Worth ruling out first, because it is more common and easier to fix. Dehydration concentrates everything and changes how minerals behave. If you are cramping and also thirsty, dark-urined and losing significant weight across a session, fix that before looking further.

But if you are drinking properly and still cramping, hydration is not your answer.

When cramping is not about minerals at all

• Doing more than you trained for. Novel intensity or duration causes cramping in people whose minerals are fine.
• Medications. Statins, diuretics and some blood pressure drugs all cause cramping.
• Nerve compression, particularly for cramps always in the same spot.
• Thyroid dysfunction.
• Persistent night cramps unrelated to exercise warrant a physician.