Relay teams are rarely beaten by faster individuals alone. The decisive ground is the exchange, where the baton either keeps moving or loses several tenths.
The baton's speed is what counts
The clock follows the baton rather than the athletes, so any moment in which the baton slows costs the team directly.
An ideal exchange happens while both runners are at or near full speed, with the baton passing between them without either decelerating.
Achieving that means the outgoing runner must already be sprinting before the baton arrives, which requires starting before he can see it.
Why the outgoing runner does not look
In short relays the outgoing runner faces forward and reaches back blind, because turning to look would cost speed and disrupt his acceleration.
He starts when the incoming runner reaches a mark on the track, calculated in advance from both athletes' speeds and rehearsed until it is automatic.
A verbal cue tells him when to extend his hand, and the whole exchange happens without visual confirmation from the receiver.
The geometry of the zone
The exchange must be completed within a marked zone, and a baton passed outside it disqualifies the team regardless of how fast they ran.
Teams therefore aim to exchange in the later part of the zone, where both runners are moving fastest, while leaving enough margin to avoid running out of space.
That trade-off between speed and safety is the central decision, and teams differ in how much risk they are prepared to carry.
Why practice matters more than talent here
The timing depends on two specific athletes and does not transfer, so a change of personnel means the marks must be recalculated and rehearsed again.
National teams assembled shortly before a championship frequently lose to squads with slower individuals who have trained together for a long period.
This is one of the few places in athletics where a team can beat a faster opponent through preparation rather than through physical superiority.
Longer relays work differently
In relays over longer distances the incoming runner is tired and the exchange is visual, with the receiver watching and adjusting to the arrival.
Positioning within the exchange area becomes a jostling contest, since several teams may arrive together and lanes have merged by that point.
The premium shifts from precision timing to awareness, but the principle holds: the race is frequently decided in the moments the baton changes hands.
