<page_title> Athletics at the 1988 Summer Olympics – Men's 400 metres </page_title> <section_title> Records </section_title> <table> <cell> World Record </cell> <cell> 43.29 <row_header> World Record </row_header> </cell> <cell> United States Butch Reynolds <row_header> World Record </row_header> </cell> </table>
Butch Reynolds had set a world record of 43.29 seconds.