In the two years preceding the 1960 Summer Olympics, she set world records in the 440-yard, 400-metre, 1500-metre and 1650-yard events.
ɪnðə tˈuː jˈɪɹz pɹɪsˈiːdɪŋ ðə nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈʌmɚɹ əlˈɪmpɪks, ʃiː sˈɛt wˈɜːld ɹˈɛkɚdz ɪnðə fˈoːɹhˈʌndɹɪd fˈoːɹɾijˈɑːɹd, fˈoːɹhˈʌndɹɪdmˈiːɾɚ, wˈʌn θˈaʊzənd fˈaɪvhˈʌndɹɪdmˈiːɾɚ ænd wˈʌn θˈaʊzənd sˈɪkshˈʌndɹɪd fˈɪftijˈɑːɹd ᵻvˈɛnts.