Today's true sports drinks are still the classic Gatorade -- packed with the electrolytes potassium, magnesium, calcium, and sodium to provide energy during intense workouts -- as well as competitors such as Cytomax, Allsport, and Accelerade.
1 Low levels of minerals, such as sodium, magnesium or potassium, in the body can be one of the reasons for Charlie horses. 2  Deficiency of calcium in pregnant women can also be another reason for the onset of Charley horse.  Low level of liquids in the body, while exercising, might be a probable cause of Charley horse.
Origin. 'Charley horse' (sometimes misspelled 'Charlie horse') is an American phrase and originated in the sport of baseball. The term is very much American and not in use in many other English-speaking countries.Charley horse' (sometimes misspelled 'Charlie horse') is an American phrase and originated in the sport of baseball.