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Disability racquetball classification is the medical based classification system developed to allow fair competition between racquetball players with different disability types and against able-bodied competitors. Internationally and in Canada, this classification system only allows only wheelchair users to be eligible to compete. In contrast, the United States classification system covers wheelchair users and people with vision impairments, with different classes inside these disability types. Internationally, the sport is governed by the International Racquetball Federation, with national governing bodies also dealing with classification including the United States Racquetball Association and Racquetball Canada. Rules for the sport were developed by the 1980s, and integration with the able-bodied side occurred by 1990 when able-bodied and wheelchair competitors competed in the same world championships. Inclusion was challenged in a court in United States in 1995. While the sport was never a full Paralympic one, it was a demonstration sport at the 1996 Summer Paralympics. Classification is handled by the IRF Committee for Athletes with Disabilities who have the ability to screen or rescreen competitors for inclusion in the classification at their discretion. There are rule modifications that differ for wheelchair users and vision impaired users. ==Definition== Classification systems for disability sport were designed to allow fair levels of competition for competitors with different types of disability, with the sport utilising a medical classification system.〔 Competitors with ambulatory disabilities are able to compete against their able-bodied counterparts as a result of classification.〔 Internationally and in Canada, there is one classification eligible for participation: wheelchair users. They must have a permanent disability that requires them to use a wheelchair, and may not be able to compete using rules for able-bodied players because of their disability.〔〔 In Canada, there have been different classes of competition inside wheelchair racquetball, with A and B at the 1989 Canadian Racquetball Championships. For racquetball in the United States, wheelchair and vision impairment racquetball are both recognised with their own classification. For players with vision impairments, three classes exist: B1, B2 and B3. B1 allows for competitors who are totally blind or having some light perception, while B2 allows for competitors with vision range that allows them to recognise hand movement to 20/600 corrected, and B3 allows for competitors with vision impairments from 20/600 to 20/200 corrected. Deaf racquetball has also been organised in the United States, with players being eligible if their hearing loss is 55 db or greater and sorted into divisions based on ability, age and gender.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wheelchair racquetball classification」の詳細全文を読む スポンサード リンク
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