PRESS RELEASE WORLD RECORDS RATIFIED © Jiro Mochizuki for the IAAF The following world records have been ratified... World record Women’s half marathon: 1:06:11wo Netsanet Gudeta (ETH) Valencia 24 Mar 2018 Previous: 1:06:25wo Lornah Kiplagat (NED) Udine 14 Oct 2007 World indoor record Men’s 4x400m: 3:01.77 Poland (K Zalewski, R Omelko, L Krawczuk, J Krzewina) Birmingham 4 Mar 2018 Previous: 3:02.13 United States (K Clemons, D Verburg, K Butler, C Smith) Sopot 9 Mar 2014