One of the most commons errors I hear coaches give to kids when they are teaching
them to punt is to "point your toe down and lock your ankle". This is probably the
worst advice you can give a young goalkeeper. Even worse yet, this is constantly
what is instructed in almost every coaching manual or textbook ever made.
When the goalkeeper points his toe down, more often then not he will give the ball
top spin when he hits it. Top spin will always cause the ball to pull itself into
the ground, meaning it will not travel as far.
By pointing the toe up the goalkeeper will be able to wrap his foot around the ball
and give it lots of back spin (or even no spin!). Back spin will allow the ball
to stay in the air longer and travel greater distances.
A ball that is back spinning is also far easier for a teammate to control then a
ball that has top spin.