Discus : What is it?
 A discus is usually lens-shaped with a raised center and a metal rim. The weight comes from a metal core encased in aluminum, wood, or rubber. Some disci are heavier around the edges, while others are center-weighted.
Men’s discus throws normally use two-kilogram discus measuring 8.66 inches, while women’s disci measure 7.17 inches and weigh one kilogram. Lighter disci are used for junior and high school throws, usually 1.616 kilograms for boys and one kilogram for girls.
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Kinds of Discus include the following:
Wood discus
Wood disci are usually made of hard plywood and resin with a steel or aluminum rim.
They are usually laminated to prevent shrinkage, a common problem with older wooden disci. They are relatively cheap and are commonly used for competitive throws.
Aluminum discus
Aluminum disci are constructed with aluminum side plates and stainless steel rims. They come in low-spin varieties for junior competitions, and high performance models for professional play. Most models are designed for beginners and intermediate throwers.
Carbon discus
Carbon disci are made of synthetic glass and carbon fibers. They usually have brass rims and high rim weights. They work best on grass surfaces and are commonly used in professional competitions.
Plastic discus
Plastic disci are usually made from polyethylene or ABS plastic and coated with fiberglass.
They usually have stainless steel rims to provide higher spin and balance weight around the center and edges. They are normally heavier around the rims, because the plastic provides limited weight to the side plates.
Rubber discus
Rubber disci are made of hard or soft rubber and have more equal weight distribution. There are usually no visible rims. They are often designed for practice and indoor use. Indoor disci are usually made of white or brown non-marring rubber to protect the gym floors and walls. They are relatively cheap and are popularly used for high school and middle school training.
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Weight balance: Choose a rim-weighted discus for more stability and angular momentum, and a center-weighted one for easier throws. Beginners should start with an evenly weighted rubber discus, as these are easier to work with.
Grip: Choose a discus that you can hold firmly and comfortably in your hand. Make sure it will not shift around your hand as you prepare for a throw, as this can affect your control and weaken your throw. |
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