Dutch runner Femke Bol rewrote her own world record in the indoor 400 metres on Saturday. Britain’s Josh Kerr steamrolled to victory in the men’s 3,000 to the delight of the home crowd. Alexander Doom of Belgium overtook Norway’s Karsten Warholm, a triple world champion in the 400 hurdles. Julien Alfred of Saint Lucia ran 6.98 — quickest in the world this season.