That sudden, agonizing calf spasm that jolts you awake at 2 AM has a name — the charley horse — and a surprisingly simple explanation in most cases. Nighttime leg cramps are one of the most common sleep disruptions, particularly in adults over 60. Understanding what triggers them, and knowing which symptoms demand medical attention, can make all the difference.
En bref
- —Most night cramps are caused by low electrolytes or dehydration
- —Potassium, magnesium and calcium are the key minerals involved
- —Some symptoms signal a circulatory problem, not a simple spasm
A mineral imbalance, not a mystery: the body chemistry behind the cramp
The charley horse is not random. Your muscles depend on a precise balance of three minerals — potassium, magnesium, and calcium — to carry out the basic cycle of contraction and relaxation. When that balance is disrupted, the system breaks down.
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