The primary role of the goalkeeper is to cover the basket. For this, he puts her back on it and strain his to keep legs on the goal. Like all players, you can not take the basket to keep or positioned on the goal.
The dimension between the goal and the bottom of the pool is sufficient enought for an attacker can lift the goalkeeper. Defense’s function is to prevent it. To do this, the defender rest his lower back on the floor and neck on the side of the basket. With this latest support always in contact, turns on the ground plane to cover the back of the goalkeeper.
The medium or attacker is the person who prevents the other team come in contact with colleagues who cover the other positions. It is the first barrier to be overcome the opposing team to approach the goal.