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Where Did the Expression Charley Horse Come From?

Where Did the Expression Charley Horse Come From?

If you have ever exercised too much and developed a painful muscle strain in a leg or arm, then you are acquainted with the “charley horse.” This is a term often used for a strain or soreness in your muscles.


The expression originated in England, where “Charley” was a common name for old horses kept for family use. The name became popular in the United States as a slang word for lame racehorses, and for the muscle strains that temporarily disable athletes.

Muscle strain results when your muscles work too hard at exercises they are not used to. Things that might bring on a muscle spasm include: Exercising when you have not had enough fluids (you’re dehydrated) and have low level of minerals such as potassium or calcium.


Upper leg spasms are more common with running or jumping activities. They can also happen at night when you are in bed.

Content for this question contributed by Steve Keifer, resident of Arlington, Gilliam County, Oregon, USA