蜜芽传媒

Jostling for position, trying to hear the calls amid the screams of 80,000 fans and the incredible speed of the athletes. Team GB sprinter Richard Kilty details the stress and pressure that 4x100m runners are under when they take to the track.

Olympic 200m silver medallist Darren Campbell admits a lot comes down to "guessing" because it is "impossible to know when your running partner hits the right mark".

This clip is taken from 5 live Sport on Tuesday, 25 July 2017.