At the 1948 Summer Olympics in London, 33 athletics events were contested, 24 for men and 9 for women. Three events made their Olympic debut at these Games: women's 200 metres, women's long jump and women's shot put. There were a total number of 745 participating athletes from 53 countries.
Records broken
14 new Olympic records were set in the athletics events. No new world records were set.
References
Athletics at the 1948 Summer Olympics Wikipedia(Text) CC BY-SA