Bad Wigins wrote:
there's nothing in the competition rules about when the split starts. Certainly it ends with the 4th leg's chest at the finish, so it makes little sense (or difference) to start it with the baton instead of the 3rd leg's chest.
Of course there would be no competition rule about splits because the competition is about attaining a single team time.
It's just easier to track the baton passing through the 200m segments.
If the exchange is made before the 200m mark, the baton passes through the 200m mark at the same time as the outgoing runner.
But if the exchange is made after, then the outgoing runner hits the mark before the baton.
Let's say the third runner gets the baton a step before the 400m stagger.
His split starts (and the prior split ends) as that outgoing runner AND the baton pass the 400m mark. (It's pretty much simultaneous unless you want to split hairs)
Now assume the anchor gets the baton 8m after the 200m mark (still in the zone).
Here, the outgoing runner and the baton are not crossing the 200m mark at the same time.
The outgoing runner hits the mark before the baton.
If you hit the split when the outgoing runner hits the 200m mark, then the third leg split will be for less than 200m. (he nor the baton has reached 200m yet)
Now take the split when the baton crosses the 200m mark and the 3rd leg split is for 200m but the anchor will be a little less than 200m.
Because the incoming and outgoing runners never line up chest to chest you can't get even splits by tracking the torsos.
But you can get perfect 200m splits by tracking the baton.