Skeleton is a fast winter sliding sport in which an individual person rides a small sled down a frozen track while lying face down, during which athletes experience forces up to 5g. It originated in St. Moritz, Switzerland as a spin-off from the popular British sport of Cresta sledding. While skeleton "sliders" use equipment similar to that of Cresta "riders", the two sports are different: while skeleton is run on the same track used by bobsleds and luge, Cresta is run on Cresta-specific sledding tracks only. Skeleton sleds are steered using torque provided by the head and shoulders. The Cresta toboggan does not have a steering or braking mechanism although the Cresta riders use rakes on their boots in addition to shifting body weight to help steer and brake.

How it all started: The sport of skeleton can be traced to 1882, when soldiers in Switzerland constructed a toboggan track between the towns of Davos and Klosters. While toboggan tracks were not uncommon at the time, the added challenge of curves and bends in the Swiss track distinguished it from those of Canada and the United States.

The skeleton (From Greek σκελετός, skeletos = "dried-body", "mummy") is the body part that forms the supporting structure of an organism. There are two different skeletal types: the exoskeleton, which is the stable outer shell of an organism, and the endoskeleton, which forms the support structure inside the body.

In a figurative sense, skeleton can refer to technology that supports a structure such as a building.

Exoskeletons are external, and are found in many invertebrates; they enclose and protect the soft tissues and organs of the body. Some kinds of exoskeletons undergo periodic moulting as the animal grows, as is the case in many arthropods including insects and crustaceans. Exoskeletons are made of different materials including chitin (in arthropods), calcium compounds (in corals and mollusks) and silicate (for diatoms and radiolarians).

The exoskeleton of insects is not only a protection but also serves as a surface for muscle attachment, as a watertight protection against drying and as a sense organ to interact with their environments. The shell of mollusks also performs all of the same functions, except that in most cases it does not contain sense organs.

Sport (or, in the United States, sports) is all forms of competitive physical activity which, through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants. Hundreds of sports exist, from those requiring only two participants, through to those with hundreds of simultaneous participants, either in teams or competing as individuals.

Sport is generally recognised as activities which are based in physical athleticism or physical dexterity, with the largest major competitions such as the Olympic Games admitting only sports meeting this definition, and other organisations such as the Council of Europe using definitions precluding activities without a physical element from classification as sports. However, a number of competitive, but non-physical, activities claim recognition as mind sports. The International Olympic Committee (through ARISF) recognises both chess and bridge as bona fide sports, and SportAccord, the international sports federation association, recognises five non-physical sports, although limits the amount of mind games which can be admitted as sports.