Why does cramping happen to some and not others. Why have with all the sports science advances have we not been able to cure the common cramp. It has affected athletes of all ages for centuries. The common thought on the cause of cramps are lack of electrolytes, dehydration and muscle fatigue. This is reinforced by the fact that cramps happen commonly at the end of the game or sporting event. Patients are then encouraged to take in plenty of fluid, use magnesium sprays, tablets or powder and have a good balanced diet to maintaining adequate carbohydrate reserves before and during sport. Muscle conditioning to the demands of the sport is an important factor to reduce the fatigue.