Her greatest success was winning the inaugural Olympic Women's Long Jump competition in London in 1948.

Additionally, she won two Universiade gold medals and a number of Hungarian Athletics Championships titles in sprint and jumping events.

[3] Shortly after, in the final years of World War II, athletics suffered a setback in Hungary as virtually no competitive events were held in the country; in this period Gyarmati moved to Budapest and married to István Várkonyi.

[3] She eventually achieved 569.5 cm on her third attempt, setting a new Olympic record and winning the gold medal.

[2] In the following years Gyarmati achieved further successes at the Universiade, winning the gold medal of the long jump event in 1949 and the 200 metres in 1951.