What watch did Josh Kerr wear for the mile world record?

A custom Amazfit Cheetah 2 Pro with diamonds and a 10K gold-dipped bezel, paired with a Project 222 Helio Armband for continuous heart rate. Kerr is a contracted Amazfit athlete.

What is the fastest mile ever run?

3:42.66, set by Josh Kerr at the Novuna London Athletics Meet on 18 July 2026. It is pending ratification by World Athletics and beats Hicham El Guerrouj’s 3:43.13 from Rome in 1999.

What were Josh Kerr's splits for the 3:42.66 mile?

55.3 at 400m, 1:51.1 at 800m, 2:46.4 at 1200m and 3:27.62 at 1500m, with the final 409m covered in 56.27 seconds and the last 109m in 16.27.

What was Josh Kerr's heart rate during the mile?

Amazfit reported an average of 178 bpm and a maximum of 188 bpm, captured by the Helio Armband on the upper arm rather than the watch’s wrist sensor.

What was Josh Kerr's cadence and stride length?

Average cadence of 194 steps per minute, rising to 199 in the final 16 seconds, with a reported maximum stride length of 2.2m. The stride figure does not reconcile with the average speed, which points to the watch under-reading distance on the bends.

Can a GPS watch measure a mile accurately on a running track?

Not reliably. Satellite positioning cuts the arc on 400m bends and under-reads distance, and stadium structures worsen multipath error. Track results come from official photo-finish timing.