Kammala jumla mai zuwa: Bayan kammala karatunta a 1951, Shivas ta koma Landan don yin aiki a Asibitin Hammersmith amma ta ci gaba da gudu ta hanyar shiga Spartan Ladies Athletics Club. A shekara mai zuwa an zaɓe ta don yin gasa a cikin
Ta yi tseren mita 100 a wasannin Olympics na bazara na 1952 da aka gudanar a Helsinki, Finland, inda ta yi tsere a cikin dakika 12.5 kuma ta gama ta uku a zafin ta a bayan Shirley Strickland da Vera Krepkina amma ba ta cancanci zuwa zagaye na gaba ba. Bayan ta cika burinta na Olympics, sai ta yi ritaya daga wasanni.