Nordic skiing

Nordic skiing encompasses the various types of skiing in which the toe of the ski boot is fixed to the binding in a manner that allows the heel to rise off the ski, unlike alpine skiing, where the boot is attached to the ski from toe to heel. Recreational disciplines include cross-country skiing and Telemark skiing.

Olympic events are competitive cross-country skiing, ski jumping and Nordic combined — an event combining cross-country skiing and ski jumping. The FIS Nordic World Ski Championships host these sports every odd-numbered year, but there are also separate championships in other events, such as Telemark skiing and ski flying. Biathlon combines cross-country skiing and rifle shooting, but is not included as a Nordic discipline under the rules of the International Ski Federation (FIS). Instead, it comes under the jurisdiction of the International Biathlon Union.

The biomechanics of competitive cross-country skiing and ski jumping have been the subject of serious study. Cross-country skiing requires strength and endurance and ski jumping requires aerodynamic efficiency, both of which requirements translate into specific skills to be optimized in training and competition.