Cross-country skiing
Channel: all the knowledge of the universe PRINCIPIA
Date: 2021-12-10

Cross-country skiing, by Wikipedia https://en.wikipedia.org/wiki?curid=6721 / CC BY SA 3.0

#Cross-country_skiing
#Nordic_skiing
Cross-country skiing is a form of skiing where skiers rely on their own locomotion to move across snow-covered terrain, rather than using ski lifts or other forms of assistance.
Cross-country skiing is widely practiced as a sport and recreational activity; however, some still use it as a means of transportation.
Variants of cross-country skiing are adapted to a range of terrain which spans unimproved, sometimes mountainous terrain to groomed courses that are specifically designed for the sport.
Modern cross-country skiing is similar to the original form of skiing, from which all skiing disciplines evolved, including alpine skiing, ski jumping and Telemark skiing.
Skiers propel themselves either by striding forward （classic style） or side-to-side in a skating motion （skate skiing）, aided by arms pushing on ski poles against the snow.
It is practised in regions with snow-covered landscapes, including Europe, Canada, Russia, the United States, Australia and New Zealand.
Competitive cross-country skiing is one of the Nordic skiing sports.
Cross-country skiing and rifle marksmanship are the two components of biathlon.
Ski orienteering is a form of cross-country skiing, which includes map navigation along snow trails and tracks.
Sami hunter using skis of unequal length—short for traction, long for gliding—and a single pole.
Both were employed until c.
 1900.
（1673 woodcut） The word ski comes from the Old Norse word skíð which means stick of wood.
Skiing started as a technique for traveling cross-country over snow on skis, starting almost five millennia ago with beginnings in Scandinavia.
It may have been practised as early as 600 BCE in Daxing'anling, in what is now China.
Early historical evidence includes Procopius's （around CE 550） description of Sami people as skrithiphinoi translated as "ski running samis".
Birkely argues that the Sami peop...