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Rafting is a team sport, in which all the crew members in the boat row and position themselves in a coordinated manner in order to balance their weight when going through the river rapids and keep themselves afloat.
The standard number of people allowed on the boat is from six to eight crew members, depending on the boat size.
Rafting beginners are recommended to remain in the center of the boat. Those who are somehow experienced and prefer to row may stay in front, whereas the most experienced generally stay at the back.

These sports are considered adventure travel par excellence. Extreme ski consists of going down quite a steep mountain with nothing but your skis. People practicing this activity have to use this technique in its maximum expression, giving priority to safety rather than to downhill speed.