Athletes use starting blocks.
Several heats may be run.
The times are compared for all heats.
World Records
Women 47.60 Marita Koch Germany 1985-Oct-06
Men 43.03 Wayde van Niekerk South Africa 2016-Aug-14
Several heats may be run.
The times are compared for all heats.
World Records
Women 47.60 Marita Koch Germany 1985-Oct-06
Men 43.03 Wayde van Niekerk South Africa 2016-Aug-14