It's a rare individual that needs to increase his sodium intake -- after all, most Americans consume way more than the 1,500- to 2,300-milligram maximum a day. However, certain people -- such as athletes who sweat a lot -- might experience a condition known as hyponatremia, or low levels of sodium in the blood.
Skiing has a history of almost five millennia. Although modern skiing has evolved from beginnings in Scandinavia, it may have been practiced as early as 600 BC in what is now China. The word ski is one of a handful of words Norway has exported to the international community.
Skiing is the action of travelling over snow or ice with one's feet placed on skis (long narrow pieces of wood or other material). There are many different forms of skiing. Some skiing events take place on icy mountain slopes and peaks and others take place on level or bumpy runs and trails.