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Transcript of Discus throw.
What is it?
The sport was known in the days of the Greek poet Homer, who mentions it in both the Iliad and the Odyssey, and it was one of five events included in the pentathlon in the ancient Olympic Games. Throwing the discus was introduced as an event in modern athletics when the Olympic Games were revived at Athens in 1896.
The discus, the object to be thrown, is a heavy lenticular disc with a weight of 2 kilograms (4.4 lb) and diameter of .219 m (0 ft 81⁄2 in) for the men's event, and a weight of 1 kilogram (2.2 lb) and diameter of .180 m (0 ft 7 in) for the women's program.
The typical discus has sides made of plastic, wood, fiberglass, carbon fiber or metal with a metal rim and a metal core to attain the weight. The rim must be smooth, with no roughness or finger holds. A discus with more weight in the rim produces greater angular momentum for any given spin rate, and thus more stability, although it is more difficult to throw.
To make a throw, the competitor starts in a circle of 2.5 m (8 ft 21⁄4 in) diameter, which is recessed in a concrete pad by 20 mm. The thrower typically takes an initial stance facing away from the direction of the throw. He then spins counter-clockwise (for right-handers) around one and a half times through the circle to build momentum, then releases his throw. The discus must land within a 34.92-degree sector.
The distance from the front edge of the circle to where the discus has landed is measured, and distances are rounded down to the nearest centimetre and the competitor who legally throws the discus the farthest is declared the winner. Ties are broken by determining which thrower has the longer second-best throw.
There are six keys movements of the discus throw: wind up, move in rhythm, balance, right leg engine, orbit, and delivery. The wind up is one of the most important aspects of the throw because it sets the tone for the entire throw. The wind up is both mental and technical. It is mental because the wind up sets the thrower up for the rest of the throw.