Muscle fatigue, dehydration, and electrolyte deficiency all are possible causes of muscle cramps and spasms. Intense exercise can result in all three of these, and major muscle spasms can follow. Muscles such as the pectorals, calves, and lower back are all prone to tightness, and therefore are more likely to experience spasms. Preventing muscle spasms is usually as simple as drinking fluids and not overworking any single muscle group. A healthy diet with plenty of vitamins can also keep spasms at bay.

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