Painful involuntary contraction due to overexertion and imbalance of oxygen, minerals and carbon dioxide; Stretch the cramped muscle with one hand and squeeze and release the body of the muscle rhythmically with the other hand. Deep breathing helps to release cramps since it increases oxygen availability.
An uncontrolled tightening of a muscle. Commonly caused by a lack of hydration or over-use of a muscle or set of muscles. Cramps may also be the result of a mineral imbalance in your body (salt, potassium, calcium).
Almost any physical activity can result in muscle cramps. A muscle can cramp when it's already in its most shortened position, and it then contracts. Many people get cramps in their legs. Other causes of cramps include low blood sugar, dehydration, and overexertion.