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.
charley-horse - a muscular cramp (especially in the thigh or calf) following vigorous exercise. charley horse. colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech. cramp, muscle spasm, spasm - a painful and involuntary muscular contraction.