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.
RELATIVE LOCATION: Located in north central Europe, Denmark is geographically positioned in both the northern and eastern hemispheres. Bordered in the south by Germany, Denmark is ringed by bodies of water including the Baltic Sea, North Sea, Kattegat Bay, Kiel Bay and the Skaggerak Strait.