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[30] [24] [31] The lightest bumper plates available are generally 5 kilograms (11 lb), or 10 pounds (4.5 kg) in pound-denominated sets. Plates lighter than this are generally smaller in diameter and are known as "change plates" when paired with bumper plates. [32] As an alternative to rubber plates, "technique plates", made of plastic, are ...
The bumper plates are coated with rubber to allow the weights to be dropped from various heights—either after a successful lift or during an unsuccessful one. Olympic bumper plates conform to international standards for coloring. That is, 10 kg is green, 15 kg is yellow, 20 kg is blue, and 25 kg is red. [19]
Presently, Olympic plates of 10 kilograms (22 lb) or more are 450 millimetres (18 in) in diameter. 450 millimetres (18 in) versions also exist of the lighter 5 kilograms (11 lb) and 2.5 kilograms (5.5 lb) plates to accommodate the proper starting position for beginner athletes. These can be aluminium or plastic and may have rubber edges.
BUR plates were shorter and thicker than competitor's plates were. This gave BUR plates the advantage of being virtually "unbreakable". Unfortunately, the increased thickness also meant that fewer plates could fit on any given bar. BUR plates were offered only in American pounds; the metric system was never used for any BUR branded product.
Plate curls – 25 kg (55 lb) x 1 rep per hand, 20 kg (44 lb) x 5 reps per hand; Double Plate curls – two 25 kg (55 lb) bumper plates with both hands x 1 rep, two 20 kg (44 lb) bumper plates with both hands x 5 reps; Barbell Reverse curl – 90.8 kg (200 lb) x 1 rep; Plate side laterals – 25 kg (55 lb) x 2 reps, 20 kg (44 lb) x 5 reps
A call for a next generation plate, to stop even greater velocity threats than the ESAPI plate was issued by the U.S. Army in 2008. [5] The X Threat Small Arms Protective Insert plates are specifically allowed scalar or flexible systems, and asked for better coverage, with less than a pound of additional weight.
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