Normally, cross country skiing is pretty straightforward. You put on cross country skis, and you ski across less mountainous terrain than downhill skiing– sometimes even flat land.
In the Olympics, this competitive sport becomes more complex, comprised of twelve separate events. Women compete in the sprint, team sprint, 10km individual start, 15km pursuit, 30km mass start and the 4x5km relay. Men compete in the sprint, team sprint, 15km individual start, 30km pursuit, 50km mass start and the 4x10km relay.
In the sprint events, individual time trials determine the 16 finalists who will compete in the quarter finals. The competitors then go through quarter-final and semi-final rounds to determine the final four who will race for the gold. So, that means in the finals there are three winners and one loser. Ouch.
Team sprint is a two person relay event. The competitors complete the relay 3 times. That means person A and person B run a relay that looks like this– A, B, A, B, A, B. Again, there are a series of heats, culminating in a five team final race.
Mass start is pretty much a race to the finish. Everyone lines up and the first person across the finish line wins.
Interval start is similar to mass start, but the racers start 15 or 30 seconds apart, depending on the event. Winners are based on individual times, rather than who actually crosses the finish line first.
The relays are mass start. Teams of four race sequentially, and the first team to cross the finish line wins.
Pursuit involves switching skis and styles halfway through the race. The styles of cross country are classic and freestyle. Classic utilizes ski wax is used to create friction, which allows the skier to use certain ski techniques, such as herringbone, diagonal stride, double pole with kick, and double pole. Freestyle, also known as skate skiing, involves the skier pushing one ski outward with the ski angled, so that the inner edge of the ski is driven against the snow, much like an ice skater. Skate skis tend to be shorter and stiffer than those used in classical technique, and poles longer.