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 In most of the cases, Charlie horses are the late responses of overstraining a muscle during exercise, or otherwise. 2  Charley horse might be the result of an electrolyte or mineral imbalance in the body.  In some of the cases, Charlie horses have been found to be a signal of the onset of a vascular disease.
What Causes Charlie Horses? Charlie Horses is the name given to muscle spasm experienced by an individual, especially in the leg. The most probable area where Charlie horse strikes is the calf region and at night. In case of such a spasm, the concerned muscle contracts and cramps, without any slightest indication beforehand.