The visual exchange step by step: positioning, looking back, hand switch and the 20 m takeover zone of the 4×400 m relay, including typical mistakes.
In the visual exchange the receiving runner looks back while setting off, takes the baton on the move and sees where it is coming. In the 4×400 m relay the exchange has to happen in a takeover zone only 20 metres long, otherwise disqualification follows [1].
The honest answer to why you look back here and not in the 4×100 m exchange: on the long legs the incoming runner arrives tired and slower, and the outgoing runner can judge the speed by eye. This is coaching knowledge, not a study result. I did not find a study on the visual exchange itself. What I can document are the rules [1] and the steps in the federation materials on baton passing [2][3][4].
Realistically you need three to four sessions until the exchange works walking and jogging, and then practice at speed. The skill is a team skill: you do not learn it alone.
The receiver stretches the arm back, the hand wide open, the thumb spread. The partner pushes the baton into the hand from below [2]. A rehearsal while sitting also works to develop the feel [3].
Milestone (practice standard): 10 passes in a row while standing, the baton stays in the hand every time.
The incoming runner calls “Hand”, the receiver stretches the arm. In the lesson of the Federal Office of Sport this very sequence is practised: standing, with the call, walking, jogging [2].
Milestone: 10 clean exchanges while walking.
Common teaching approach: the right hand passes, the left hand receives. Shortly before the exchange the incoming runner switches the baton into the right hand so as not to run into the receiver [3]. The receiver then moves to the inside and passes the baton on with the right [3].
Milestone: 8 out of 10 exchanges at a jog without dropping the baton.
The take-off position comes from the standing start with a look back, for advanced athletes with one hand on the ground [2]. You set off when the incoming runner reaches the mark. You determine your check mark by trying it out: too early and you run away from them, too late and they catch you up.
Milestone: you set off at the same mark in 8 out of 10 attempts.
Now you exchange in the zone. The pass begins when the receiver first touches the baton and ends when only they hold it. What counts is the position of the baton, not the feet [1]. You may not start running outside the zone [1]. The incoming runner runs through the zone without braking (practice).
Milestone: 8 out of 10 exchanges in the zone without anyone braking or being run into.
At the exchange, tired and fresh runners meet at full speed. So: stay in your lane until the track is clear. Holding your position before receiving or after handing over avoids obstruction [1]. Waiting athletes may only move to the inside if nobody is obstructed [1].
Also: warm up. Of 357 athletes before the 2018 European Championships, 48 % had had a hamstring injury in their career and 24 % in the current season [5]. This guide explains and motivates; it does not replace supervised training or a coach.
The trick many overlook: the line-up of the waiting athletes is compulsory. In the 4×400 m relay the waiting athletes line up from inside to outside in the order in which their team-mates enter the last bend. After that the order is no longer swapped [1]. If you look for “your” place instead, you risk disqualification, and electronics may be used to check the order [1]. So before the competition, learn whom you have to count in the last bend.
20 metres. The line where the takeover zone begins lies 10 metres before the middle, the scratch line is in the middle [1]. The baton must be passed inside the zone, otherwise disqualification follows [1]. The exact dimensions are in the current rule book.
When the receiver can keep the incoming runner in view, so on longer legs such as the 4×400 m relay. The rule book does not prescribe the technique, it only requires the pass inside the zone [1]. In short relays the exchange is usually made without looking.
In the common teaching approach the right hand passes and the left receives, and afterwards the receiver switches the baton into the right hand [3]. That is a convention, not a rule. What matters is that your team fixes the hand beforehand and trains it.
The runner who dropped it picks it up again. They may leave their lane to do so if they do not shorten the distance and do not obstruct anyone [1]. In that case it is not a disqualification.
You line up from inside to outside in the order of the incoming teams as they enter the last bend. After that you stay in this order until the exchange takes place [1]. When lanes are not used, you may move to the inside without obstructing anyone [1].
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