Josh Kerr shattered the 27-year-old world mile record in London on Saturday. The 28-year-old was cheered on by the crowd as he completed his extraordinary feat.

At the London Diamond League on Saturday, 2024 Olympic 1,500m silver medallist Kerr will try to beat a time that has stood since 1999.

To support Kerr's attempt to break the men's mile world record, there's been plenty of research, testing and product development