As with jumpers, the kit needed for throwers is similar
to the requirements of runners, with the addition of modified footware and,
if you would like it, your own implements to throw.
The footwear varies depending on the surface from which you are going to
throw. For javelin, you throw from a runway - generally with the same surface
(tartan) as a track, therefore you need spikes in your shoes.
The javelin boots are modified with additional spikes in the heel and
are generally built up around the ankle to add extra support.