Any of the muscles that are under our voluntary control (skeletal muscles) can cramp. Cramps of the extremities, especially the legs and feet, and most particularly the calf (the classic  charley horse ), are very common.
Northern Europe includes Denmark, Finland, Greenland, Iceland, Norway, and Sweden. This area is known for harsher environments. It is generally cold, has poorly developed soils and limited mineral resources. This region has a population of over 25 million people.
Scandinavia [1] or, more broadly, Nordic Europe, is a European region north of the Baltic Sea. At almost 1.2 million square kilometres (463,000 square miles) it is the largest region in Europe, but home to only around 24 million people, accounting for a mere 4% of the population.