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.
Sport in Denmark. Denmark is Nordic country that is is bordered by Norway in the north and Germany in the south. As with any sport loving country in Europe, it adores soccer. As a matter of fact, Denmark has 1600 football clubs with more than 320, 000 players in their rosters.