<prompt> Bhala okuqhubekayo kwalesi sigaba - Imithetho yalo mdlalo isukela emuva ngawo-1980. Ngo-1985, kwahlanganiswa imincintiswano kazwelonke yaseCanada, kwafakwa bobabili abagijimi abangakhubazekile nabakhubazekile emcimbini ofanayo. Ngo-1990, lo mdlalo waba ngowokuqala ukuhlanganisa ubuqhawe bomhlaba kwabancintisana abangakhubazekile nabancintisana abakhubazekile. Ngawo-1990, i-racquetball yayingenye yezemidlalo abantu abakhubazekile ababenamathuba amaningi okuyidlala. E-United States ngo-1995, umsebenzisi wesihlalo sabakhubazekile wamangalela i-racquetball league ngemva kokungakwazi ukuncintisana nabadlali abasezingeni eliphakeme ngomthetho oshintshiwe wokugxuma kabili, ecaphuna i-Americans With Disabilities Act futhi esola ukwephulwa kwesihloko III somthetho. Inkantolo yakhipha isinqumo esivuna leligi, yathi ukuguqulwa komthetho wabasebenzisa isihlalo sabakhubazekile kwakuyoshintsha ngokuyisisekelo imithetho yomdlalo. Ukuhlukaniswa kwezemidlalo yezihlalo ezinamasondo ezingeni lama-Paralympic kwakuhlelwa yi-ISMWSF futhi kwakuhlanganisa zonke izinhlobo zabasebenzisi bezihlalo ezinamasondo. Naphezu kwalezi zinguquko ekuphathweni kwezemidlalo, i-racquetball ayikaze ifakwe ohlelweni lwe-Paralympic njengomdlalo ophelele wemidlalo, yize kwakuwumdlalo wokubonisa kuma-Paralympic ehlobo ka-1996  <response>: . futhi. 