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.
A charley horse is another name for a muscle spasm that you may experience anytime, including while you are asleep. The causes of charley horses include lifestyle factors, certain medical conditions and physical exertion of your muscles. charley horse may occur during or just after exercise as a result of dehydration, which causes a buildup of salts in your muscles.