▁in ▁wheel ch air ▁basketball ▁have ▁highly ▁cam ber ed ▁whe els ▁( to ▁prevent ▁injury ▁to ▁players ▁hands ). ▁There ▁have ▁also ▁been ▁the ▁addition ▁of ▁rear ▁cast or ▁whe els ▁to ▁prevent ▁falling ▁backwards , ▁and ▁high ▁te ch ▁materials ▁such ▁as ▁carbon ▁fib re ▁and ▁tit an ium ▁are ▁being ▁used ▁in ▁the ▁seats , ▁frames ▁and ▁sp okes ▁ ▁W heel ch air ▁rugby ▁ ▁W heel ch air ▁rugby ▁is ▁played ▁by ▁athlet es ▁with ▁quad ri ple gia ▁who ▁was ▁played ▁as ▁a ▁demonstr ation ▁sport ▁at ▁the ▁ 1 9 9 6 ▁Atlanta ▁Par al ym pic ▁Games . ▁W heel ch airs ▁made ▁its ▁debut ▁as ▁a ▁medal ▁sport ▁at ▁the ▁ 2 0 0 0 ▁Sydney ▁Par al ym pic ▁games . ▁These ▁wheel ch airs ▁have ▁these ▁following ▁characteristics , ▁they ▁have : ▁ ▁A ▁higher ▁back ▁for ▁tr unk ▁control , ▁ ▁A ▁greater ▁degree ▁of ▁dump ▁( se at ▁angle ) ▁to ▁stop ▁the ▁player ▁from ▁falling ▁forward . ▁The ▁angle ▁also ▁helps ▁the ▁player ▁carry ▁the ▁ball ▁in ▁their ▁lap , ▁ ▁Metal ▁shr oud ▁covering ▁sp okes , ▁ ▁For ward ▁metal ▁protection ▁for ▁contact , ▁▁ ▁High ▁wheel ▁cam ber ▁to ▁prevent ▁injury ▁to ▁player ’ s ▁hands . ▁The ▁whe els ▁used ▁between ▁the ▁ 1 9 9 6 ▁and ▁ 2 0 0 0 ▁Par al ym pic ▁Games ▁were ▁consider ably ▁different ▁in ▁their ▁construction . ▁With ▁wheel ch airs ▁used ▁in ▁the ▁ 1