The Fusion Series (Standard) Back Extension nwere ihe eji ejegharị n'ime ya na rollers a na-emegharị azụ, na-enye onye mmega ahụ ohere ịhọrọ oke mmegharị ahụ. Mpempe úkwù na-agbasawanye na-enye nkwado dị mma na nke magburu onwe ya n'oge usoro mmegharị ahụ dum. Ngwaọrụ niile na-eketakwa uru nke Fusion Series (Standard), ụkpụrụ lever dị mfe, ahụmịhe egwuregwu mara mma.