GLASGOW - Dutch runner Femke Bol rewrote her own world record in the indoor 400 metres on Saturday, while Britain's Josh Kerr steamrolled to victory in the men's 3,000 to the delight of the home crowd at the world indoor athletics championships.

The 24-year-old 400 hurdles specialist made it look effortless, leading from the gun to clock 49.17 seconds and beat the previous mark of 49.24 she set two weeks ago at the Dutch national championships.