We are now going to use the posts lengthwise, namely one player of the pair attacks the post opposite to him or her.
One player of the opposite post does the same.
How does this work?
Of each pair there is a number 1 and a number 2.
Number 1 is going to defend his post for a minute and a half against the other number 1 of the post opposite to him.
When the number 1 of a post has had a chance, the other number will attack and so there will be a change of function (and of post, because everyone is defending his own post).
So there is always a change of function if the attacker has lost the ball.
As a player, you are attacking as well as defending for a minute and a half