Duathlon ngumcimbi lweembaleki entlantlu inxalenye yokuqala ugqatso, ilandelwe yinxalenye ibhayisikile kwaye isebenza kwakhona kwenye, ngendlela efana netrayethloni. I-International netrayethloni Union cwangcisa imithetho ngamazwe kunye nomiselo lo mdlalo.