Rubuta ci gaba don wannan sakin layi - Bayan kammala karatunsa a 1951, Shivas ya koma London don yin aiki a Asibitin Hammersmith amma ya ci gaba da gudu ta hanyar shiga kungiyar 'yan wasan mata ta Spartan. A shekara mai zuwa an zaba ta don yin gasa a cikin mita 100
a gasar Olympics ta 1952 da aka gudanar a Helsinki, Finland, inda ta yi gudu a lokacin 12.5 seconds kuma ta gama na uku a cikin 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.