Minnesota is ranked first among US states for percentage of population who regularly exercise. Its residents engage in a large number of outdoor activities during the summer months, such as boating, water skiing, hiking and fishing. But these descendents of Scandinavian and German immigrants remain just as active in the winter time. “The Land of 10,000 Lakes” experiences very cold and long winters, during which residents flock to the ice to play hockey, skate, and engage in curling. Ice-fishing, a Scandinavian tradition, is also a major activity in which adherents construct small sheds to place...