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 is another name for a muscle spasm. Charley horses can occur in virtually any muscle, but they are most common in the legs. These spasms are marked by extremely uncomfortable muscle contractions. The muscles donât relax for several seconds or more, and the pain can be quite severe.